Looks like an SAT to me. Be interesting if there are any Werbers with button flaps in there, as that would be the Werber 6225 contract.
Hap Arnold’s Martin B-10 Alaska mission.
The person to Hap Arnold's right, Maj. Hugh J. Knerr per @2BM2K on an earlier post (on the left below), appears to be wearing a Werber 32-6225. Except for the nicely scalloped pockets, laid back epaulets and, perhaps, a collar hook it's hard to make out anything else. Great thing about this picture is that it shows the custom insignia from the Alaska 1934 mission ensuring an official regulation jacket issue (unlike a stray jacket photo). Compare to the button-flapped pockets of the SAT 32-485 on the right.Looks like an SAT to me. Be interesting if there are any Werbers with button flaps in there, as that would be the Werber 6225 contract.