22-1/5		Engineering Div/Sperry Messenger M-1
22-6		Engineering Div/Sperry Messenger M-1; rebuild of 64227
22-7/200	?
22-201/225	Aeromarine NBS-1
22-226		Consolidated TW-3
22-227/243	?
22-244/245	Loening PW-2A
22-246/251	Loening PW-2A; contract cancelled
22-252/256	?
22-257    	Atlantic DH-4M-2T
22-258/265	?
22-266/275	Consolidated TA-3
22-276/325	Eberhart SE5-E; rebuilt SE5a
22-326/328	Verville-Sperry R-3
22-329/348	Engineering Division/Sperry Messenger M-1
22-349/350	Sperry Messenger Aerial Torpedo MAT
22-351/355	Sperry M-1A
22-356/359	Atlantic DH-4M-2T
22-360/370	Sperry M-1A
22-371/378	?
22-379/400	Vought VE-9, no USAS designation applied
22-401/402	Consolidated TW-3
22-403/490	block not used
22-491/528	?
22-529/571	Curtiss JN-4H
22-572/599	Curtiss JNSE
22-600/999	?
22-1000/1049	Boeing DH-4B
22-1050/1052	Wittemann-Lewis DH-4B
22-1053/1058	Fisher DH-4B
22-1059		?
22-1060/1099	Wittemann-Lewis DH-4B
22-1100/1149	Aeromarine DH-4B
22-1150/1199	Thomas-Morse DH-4B
23-1/8		Loening S-1 
23-9/108	?
23-109		Boeing XCO-7A
23-110/378	?
23-379/400	Vought VE-9
23-401/405	?
23-406		Atlantic DH-4B
23-407/422	?
23-423		Fisher DH-4B
23-424		?
23-425/427	Atlantic DH-4B
23-428/472	?
23-473/480	Curtiss JNS-1; JN-4/6 rebuilt with Wright-Hispano I
23-481/484	?
23-485/486	Curtiss JNS-1
23-487		?
23-488/490	Curtiss JNS-1
23-491		?
23-492		Curtiss JN-4H
23-493/494	Curtiss JNS-1
23-495/531	?  
23-511		DH-4B
23-512/514	?  
23-515		DH-4B-4
23-516/522	DH-4B
23-523/524	DH-4B-1
23-525/531	? 
23-532/551	Curtiss JNS-1
23-552/553	?  DH-4B-P1
23-554/555	Curtiss JN-6H
23-556/557	Curtiss JN-4H
23-558/604	?
23-605/650	Curtiss JN-4H
23-651/659	?
23-660/674	Gallaudet DH-4B
23-675/684	?
23-685/688	Atlantic DH-4M  DH-4B
23-689/690	?   
23-691		Engr Div DH-4B "Honeymoon Express"
23-692/698	?   
23-697		DH-4B
23-698		?   
23-699		Cox-Klemm DH-4B
23-700/701	?
23-702		Atlantic DH-4M
23-703/708	?   DH-4B
707/726 	DH-4
23-709/715	Cox-Klemm DH-4B
23-716/725	Atlantic DH-4M
23-726		Wittemann-Lewis DH-4B
23-727/729	?
23-730		Wittemann-Lewis DH-4B
23-731		?
23-732		Atlantic DH-4M
23-733/737	?
23-738		Wittemann-Lewis DH-4B
22-739		?
23-740/743	Atlantic DH-4M
23-744		Wittemann-Lewis DH-4B
23-745/750	?
23-751/757	Atlantic DH-4M
23-758		Wittemann-Lewis DH-4B
23-759/765	?
23-766/774	Atlantic DH-4M
23-775/936	?
23-937		Curtiss JN-4H
23-938/948	Eberhart SPAD 13E
23-949/1106	?
23-1107/1125	DH-4B
23-1126/1199	?
23-1200		Dayton-Wright DH-4B-5
23-1201/1203	Curtiss XPW-8
23-1204		Engineering Division XCO-5 
23-1205/1209	Fokker CO-4A
23-1210		Douglas World Cruiser DWC
23-1211/1215	Huff-Daland TW-5
23-1216/1218	Boeing XPW-9
23-1219/1228	?
23-1220		LWF T-3
23-1229/1232	Douglas World Cruiser DWC
23-1233		?
23-1234		Loening XCOA-1
23-1235		Curtiss R-8 < USN R2C-1
23-1236		Engineering Division XCO-6 > XCO-6B > XCO-6C
23-1237/1246	?
23-1247/1248	Cox-Klemm XA-1
23-1249		?    Engr Div DH-4B-5
23-1250		Huff-Daland XLB-1
23-1251		Douglas XO-2
23-1252		Curtiss XO-1
23-1253		possibly Consolidated TW-8, modified TW-3 as proto PT-1
23-1254		Douglas XO-2 (Dayton-Wright XO-3 Mohawk?)
23-1255		Martin XO-4, cancelled contract
23-1256/1299	?
23-1300/1319	Consolidated TW-3
24-1		Loening S-1  
24-2/7		Douglas DOS > O-5 
24-6/7		Loening COA-1  (conflict here)
24-8		Loening COA-1
24-9/33		?
24-34/37	Atlantic DH-4BM-2T
24-38/40	?
24-41/48	Curtiss JN-6H, built as JN-6HG
24-49/50	?
24-51/54	Dayton-Wright DH-4BP-1
24-55/56	?
24-57/59	Curtiss JNS-I
24-60/63	?
24-64/85	Dayton-Wright DH-4B
24-86/91	?
24-92/93	Curtiss JNS rebuilt
24-94		?
24-95		Dayton-Wright DH-4B
24-96/99	?
24-100/108	Curtiss JNS rebuilt
24-109/114	?
24-115/131	Gallaudet DH-4B
24-132/133	?
24-134/135	Curtiss JNS (JN-1)
24-136/139	?
24-140/150	Curtiss JN-6H
24-151		?
24-152/161	Curtiss JN-4H
24-162		?
24-163		Curtiss JNS
24-164/170	Curtiss JN-6H
24-171/180	Curtiss JN-4H rebuilt from earlier model > JN
24-181/184	?
24-185		Curtiss JNH
24-186/195	Curtiss JN-6H; built as JN-6HG
24-196/200	?
24-201/225	Curtiss PW-8 Hawk
24-226/227	Curtiss JNS rebuilt
24-228/230	?
24-231/245	Curtiss JNS rebuilt
24-246		?
24-247/253	Fisher DH-4B
24-254		?
24-255/274	Curtiss JNS rebuilt
24-275/436	?
24-437		Fisher DH-4B
24-438/450	?
24-451/454	Boeing DH-4M-1
25-1/44		Curtiss JNS rebuilt
25-45		?
25-46		DH-4B-1
25-47		Dayton-Wright DH-4B
25-48		DH-4BK
25-49/50	?
25-51		Curtiss JN-6H built as JN-6HG
25-52		Dayton-Wright DH-4BM
25-53		Curtiss JNS rebuilt
25-54		Dayton-Wright DH-4BP-1
25-55		?
25-56/77	Curtiss JNS rebuilt
25-78		Gallaudet DH-4BK
25-79/82	Gallaudet DH-4B
25-83		Gallaudet DH-4BM
25-84		Curtiss JNS
25-85/89	Witteman DH-4B
25-90		Curtiss JNS rebuilt
25-91/126	?
25-127/129	Curtiss JNS rebuilt
25-130		?
25-131		DH-4B
25-132/133	?
25-134/160	Curtiss JNS rebuilt
25-161/163	Fisher DH-4BK
25-164		?
25-165/200	Curtiss JNS rebuilt
25-201/225	?
25-226/234	Loening COA-1
25-235/244	Huff-Daland AT-1        
25-245/294	Consolidated PT-1
25-295/323	Boeing PW-9
25-324		Boeing PW-9 > XP-4
25-325		Curtiss O-1 Special
25-326/330	Curtiss O-1
25-331/332	Curtiss XO-13A and XO-13 racers
25-333		Curtiss O-1A
25-334		Curtiss O-1
23-328		Curtiss XO-11
25-335/379	Douglas O-2
25-380		Douglas XA-2
25-381/386	Douglas O-2B
25-387/404	Douglas O-2A
25-405		Douglas O-7 > O-2C
25-406/407	Douglas O-7 > O-2
25-408		Douglas O-8; O-2 with Curtiss R-1454 > O-2A
25-409		Douglas O-9; O-2 with geared Packard 1A-1500
25-410		Curtiss P-1 > XP-17	
25-411/419	Curtiss P-1
25-420		Curtiss P-1 > P-2
25-421/422	Curtiss P-1, P-1A
25-423		Curtiss XP-6 racer
25-424		Curtiss P-1A
25-425		Douglas C-1
25-426		Douglas C-1A
25-427/433	Douglas C-1
25-434		?
25-435/436	Thomas-Morse XO-6 (all-metal Douglas O-2)
25-437/439	Thomas-Morse O-6
25-440		Thomas-Morse XO-6B
25-441/447	Curtiss JNS rebuilt
26-1/14		Douglas O-2C (conflict here)
26-1		Curtiss JNA
26-2		Curtiss JNS
26-3		Douglas DH-4B
26-4/14		Curtiss JNS
26-15		?
26-16/17	Curtiss JNS
26-18		Curtiss JN-6H, built as JN-6HG > JNS
26-19		Curtiss JNS
26-20		Curtiss JN-6H, built as JN-6HG > JNS
26-21		?
26-22		Curtiss JN-4H > JNS > JNSI
26-23/25	Curtiss JNS
26-26		Curtiss JN-4D converted to JNS
26-27/28	Curtiss JN-6H built as JN-6HG
26-28		Curtiss JN-6H converted to JNS
26-29/30	Dayton-Wright DH-4BK
26-31/35	Curtiss JNS rebuilt
26-36/200	?
26-201		Huff-Daland XHB-1
26-202		Fokker-Atlantic C-2
26-203		Fokker-Atlantic C-2 > XC-2
26-204		Fokker-Atlantic C-2
26-205		Driggs Dart - no designation assigned
26-206		Embry-Riddle WAC - no designation assigned
26-207		?
26-208		Huff-Daland XLB-5
26-209		?
26-210		Atlantic (Fokker) XLB-2
26-211		Curtiss XB-2
26-212		Loening XO-10
26-213/225	?
26-226/275	Consolidated PT-1
26-276/279	Curtiss P-1A
26-280 		Curtiss XP-1A
26-281/294	Curtiss P-1A
26-295 		Curtiss P-1A > XP-6A racer
26-296 		Curtiss P-1A > XAT-4
26-297/279	Curtiss P-1A
26-300		Curtiss P-1A as XP-3A > XP-21 > XP-21A
26-301/350	Consolidated PT-1
26-351/373	Boeing PW-9A
26-374		Boeing PW-9A > AT-3
26-375		Boeing PW-9B
26-376/385	Huff-Daland LB-1
26-386		Douglas O-2C
26-387 		Douglas XO-2C
26-388/417	Douglas O-2C
26-418		Douglas O-2E
26-419/420	Douglas O-2D
26-421/427	Douglas C-1C
26-428/442	Loening OA-1A
26-443/457	Boeing PW-9C
27-1		Curtiss O-11 > O-11A
27-2/4		Curtiss O-11
27-5		Curtiss O-11 > XO-12
27-6/35		Curtiss O-11
27-36/62	?
27-63/70	Curtiss P-1B
27-71		Curtiss XP-1B
27-72		Curtiss P-1B
27-73		Curtiss XP-1B
27-74/87	Curtiss P-1B
27-88/97	Curtiss AT-4; P-1 trainer > P-1D
27-98		Curtiss XO-11
27-99/107	Curtiss O-11
27-108/148	Consolidated PT-1
27-149		Consolidated XPT-2
27-150/176	Consolidated PT-1
27-177		Consolidated XPT-3 > XPT-5 > PT-3 standard
27-178/201	Boeing PW-9C
27-202		Boeing PW-9D
27-203/212	Douglas C-1C
27-213/237	Curtiss AT-4; all > P-1D
27-238/242	Curtiss AT-5; all > P-1E
27-243		Curtiss O-1B > A-3 > O-1B
27-244		Curtiss O-1B > XA-4
27-245/262	Curtiss O-1B
27-263		Curtiss O-1B > XO-18 > O-1B
27-264		Curtiss O-1B > O-1C
27-265		Curtiss O-1B
27-266		Curtiss O-1B > O-1C > O-13B
27-267/268	Curtiss O-1B > O-1C
27-269/275	Curtiss O-1B
27-276		Curtiss O-1B Special
27-277/287	Curtiss O-1B
27-288/297	Douglas O-2H
27-298/305	Curtiss A-3
27-306		Curtiss A-3 > A-3A
27-307/309	Curtiss A-3
27-310		Curtiss A-3 > A-3A
27-311/314	Curtiss A-3 
27-315		Curtiss A-3 > A-3A
27-316/317	Curtiss A-3
27-318/326	Loening OA-1B
27-327		Curtiss XP-5
27-328/331	Curtiss P-5
27-332		Martin XLB-4; contract cancelled
27-333		Huff-Daland/Keystone XLB-3
27-334		Keystone XB-1
27-335/344	Huff-Daland/Keystone LB-5
28-1/25		Keystone LB-5A
28-26/41	Boeing PW-9D
28-41		Boeing PW-9D > XP-7
28-42/44	Curtiss AT-5A > P-1F
28-45		Curtiss AT-5A 
28-46/51	Curtiss AT-5A > P-1F
28-52/54	Curtiss AT-5A 
28-55/64	Curtiss AT-5A > P-1F
28-65		Curtiss AT-5A 
28-66		Curtiss AT-5A > P-1F
28-67/69	Curtiss AT-5A 
28-70/72	Curtiss AT-5A > P-1F
28-73/82	Loening OA-1C
28-83/115	Curtiss A-3
28-116/118	Curtiss A-3 > A-3A
28-119/120	Fokker C-2A > C-7A
28-121/122	Fokker C-2A 
28-123		Fokker C-2A > C-7A
28-124		Fokker C-2A 
28-125		Fokker C-2A > C-7A
28-126		Fokker C-2A > XC-7
28-127		Douglas O-2J
28-128/187	Douglas O-2H
28-188		Douglas O-2J
28-189		Curtiss P-3A > XP-3A > XP-21 > P-1F
28-190/193	Curtiss P-3A
28-194		Douglas XO-14
28-195		Keystone XO-15
28-196		Curtiss XO-16
28-197/206	Curtiss O-11
28-207		Curtiss O-11 > O-13D > O-13C > O-1B
28-208/217	Curtiss O-11
28-218/228	Consolidated PT-3
28-229		Consolidated XO-17 < PT-3
28-230/292	Consolidated PT-3
28-293		Consolidated PT-3 > XPT-4
28-294/316	Consolidated PT-3
28-317		Consolidated XO-17A < PT-3 > XPT-8
28-318/347	Consolidated PT-3
28-348		Ford C-3
28-349/358	Douglas O-2H
28-359		Boeing XP-8
28-360/385	Consolidated O-17
28-386		Boeing XP-9
28-387		Curtiss XP-10
28-388		Keystone LB-7
28-389		Keystone LB-7 > LB-12
28-390/395	Keystone LB-7 > ZLB-7
28-396/397	Consolidated O-17
28-398/399	Curtiss B-2
28-400		Thomas-Morse XO-19
28-401		Thomas-Morse O-19
28-402		Thomas-Morse YO-20 
28-403		Thomas-Morse XO-21
29-1/3		Keystone LB-7 > ZLB-7
29-4		Keystone LB-7
29-5		Keystone LB-7 > ZLB-7
29-6/8		Keystone LB-7
29-9		Keystone LB-7 > XLB-8
29-10		Keystone LB-7 > XLB-9 > LB-6
29-11/12	Keystone LB-6 > ZLB-6
29-13/14	Keystone LB-6 > LB-7
29-15		Keystone LB-6
29-16		Keystone LB-6 > LB-7
29-17/25	Keystone LB-6
29-26		Keystone LB-6 > LB-11 > LB-11A > LB-6 > ZLB-6
29-27		Keystone LB-10
29-28/29	Curtiss B-2
29-30		Curtiss B-2 > B-2A
29-31/37	Curtiss B-2
29-38/157	Consolidated PT-3A
29-158/163	Douglas O-2H
29-164		Douglas O-25
29-165/178	Douglas O-2H
29-179/183	Douglas O-2K
29-184		Douglas O-29 > Y1O-29A > O-29A
29-185/208	Douglas O-2K
29-209		Douglas O-2J
29-210/217	Douglas O-2K
29-218		Douglas O-32 > BT-2
29-219		Ford C-4
29-220/226	Ford C-3A > C-9
29-227/237	Curtiss P-1C
29-238		Curtiss P-1C > XP-1C
29-239/258	Curtiss P-1C
29-259		Curtiss XP-6B
29-260		Curtiss P-6 > XP-6D > P-6A
29-261		Curtiss P-6
29-262		Curtiss P-6 > P-6A > XP-22 > P-6A
29-263		Curtiss P-6 > XP-6A > P-6A
29-264/265	Curtiss P-6 > P-6A
29-266		Curtiss P-6 > P-6D
29-267/268	Curtiss P-6 > P-6A
29-269/273	Curtiss P-6 > P-6D
29-274/281	Loening OA-2
29-282/287	Curtiss O-1E
29-288		Curtiss O-1E > O-1F
29-289/294	Curtiss O-1E
29-295		Curtiss O-1E > XBT-4 > XO-1G > Y1O-1G
29-296/318	Curtiss O-1E > YO-13C > O-13C
29-319/321	Curtiss O-1E
29-322		Curtiss O-1E > XO-26 > Y1O-26
29-323		Vought XO-28 < USN O2U-3
29-324		Moraine BI-2
29-325		Fairchild XC-8 > XF-1
29-326		Berliner-Joyce XP-16
29-327		Fokker XO-27
29-328		Fokker XB-8
29-329		Boeing P-12B > XP-12G > P-12B
29-330/341	Boeing P-12B
29-342/351	Douglas O-2H           
29-352		Thomas-Morse YO-23
29-353/361	Boeing P-12
29-362		Boeing XP-12A
29-363/366	Curtiss P-6, all > P-6D
29-367/368	Curtiss P-11, all delivered as P-6, later > P-6D
29-369		Thomas-Morse O-19
29-370		Thomas-Morse O-19A
29-371/372	Douglas O-22
29-373		Douglas YO-34
29-374		Curtiss YP-20 > XP-6E > XP-6F
29-375/404	Douglas O-2H
29-405		Fokker C-5
29-406		Sikorsky C-6
29-407		Fokker C-7A > XC-7A > C-7A
29-408/412	Fokker C-7A
29-413/432	Douglas O-2K 
29-433/450	Boeing P-12B
29-451		Curtiss XO-30; cancelled contract
29-452		Curtiss XC-10 
29-453		Thomas-Morse XP-13 > XP-13A