This model is a version of S-56 H-37
c/n 56-057
Year 1958
| ID | | |  55-628
US Army Aviation | | Sikorsky S-56, c/n 56-057, ff:?
del US ARMY as H-37A, 55-628, 17Jan58
redesig CH-37A, Oct 62
conv CH-37B, unk
wfu & soc unk.  |
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