This model is a version of S-56 H-37
Helicopter Sikorsky H-37A Mojave Serial 56-033 Register 55-610 used by US Army Aviation. Built 1957. Aircraft history and location
| US Army Aviation |
|1957-08-07||Sikorsky S-56, c/n 56-033, ff:?|
del US ARMY as H-37A, 55-610, 07Aug57
redesig CH-37A, Oct 62
conv CH-37B, unk
wfu & soc unk.