O-1, (Model 37)
O-1B, (Model 37B)
O-1G, (Model 38)
XO-18, (Model 37B)
O-11, (Model 37C)
XO-13A, (Model 37C)
XOC-3, (modified Model 37D)
O-1B, (Model 37F)
O-16, (Model 37G)
XO-16, (Model 37G)
O-39, (Model 38A)
OC-2, (Model 49)
O2C-1, (Model 49)
O2C-2, (Model 49B)
Y1O-40B, (Model 62A)
XO3C-1, (Model 71)