8H18T The Bosun

GENERAL MANUFACTURING INSTRUCTIONS NO. 520
Subject: Style No. 8H18T
A combination consisting of a silent clock and barometer each utilizing a 3-2" round dial and mounted on a California Burl red wood base will be added to the standard General Electric line. Assembly drawing 2-CA-2492. Assembly list L-3100. The overall dimensions will be as follows: Height 7-1/8"; Width 17-1/4"; Depth 3-1/8".

I don't know when these clocks managed to get themselves sold but it warn't for long.  They missed the 1941-'42 catalog (not Barotime) and were surely discontinued the next April with everything else.  All we have by way of a description is their manufacturing instructions but leave it to the 1950 Parts Catalog to have a nice pic.