RCA ET-8037 schematic needed

[VA3AEX]

I bought and now need a schematic for a RCA ET-8037, a Marine radiotelephone by Radiomarine Corporation.

It's crystal controlled either on 2 and 4 MCs; date stamped Nov. 1/1949; Mod and Output tubes are 1625s; iron is Kenyon; and appears complete.  The vendor couldn't tell me anything about its background but suspect it was used in ships in the Great Lakes.

Any help with a schematic would be much appreciated!

73  Alex