Here are some photos I took of Cessna T-37 Tweet examples on display at several locations. During Vietnam, weapons were added to the T-37 trainer and it became the A-37 Dragonfly. The plane I photographed at Fort Novosel in Alabama actually spent time as both an T-37 and an A-37 during its career.
T-37B 56-0576
Air Mobility Command; Dover DE 2026
T-37A 56-3466 #40038
Cessna T-37A Tweet 56-3466; converted to A-37A Dragonfly 67-14520; reconverted to T-27B, painted as 56-3465