Here are some photos I took of Cessna O-2 Skymaster / Bird Dog examples on display in California, Hawaii, Ohio, Oregon, Washington, South Dakota, Georgia and Florida. This is the military version of the Cessna 337 Skymaster.
On my list is a pair of consecutive airframes: 68-6864 (Eglin AFB) and 68-6885 (Oshkosh 2024)
O-2A 67-21331
NMoUSAF 2018
O-2A 67-21363
Museum of Flight’s Restoration Hangar 2017
O-2A Skymaster 67-21380 “Big Herb”
Robins AFB 2024
O-2A 67-21395
Evergreen Museum 2018
O-2A Super Skymaster 67-21413
Castle AFB, Atwater CA 2024
O-2 Skymaster 67-21418
Fort Worth Aviation Museum 2024
O-2A Bird Dog 67-21422
South Dakota Air Museum 2021
1967 Cessna O-2A 67-21424 #337M-0130
Oshkosh 2024
Oshkosh 2025
O-2 Skymaster 67-21430
Fort Worth Aviation Museum 2024
1967 O-2B 67-21452 (#337-0454)
Oddly enough, the number painted on tail is 67-21446
Oshkosh 2025
O-2B 67-21465
March AFB 2018
O-2A Skymaster 68-6864
Air Force Armory Museum; Eglin AFB 2024
1968 Cessna O-2A 68-6885 #337M-0174
Oshkosh 2024
Oshkosh 2025
1968 O-2A 68-6892 #337M-0181
Heritage Flight Museum 2023
1969 O-2A 68-11029 #337M-0305
Valiant Warbirds Museum 2024
Cessna O-2A 68-11145
This is a composite aircraft, wears markings 86857