Gibson 1936-1937 EH 150 Amplifier 2nd Series

Amp with cover.
Featuring 6 tubes, an upgrade from the previous 1st generation's 4. 1936's Catalog X.
1936 Catalog X.
Above photographed book is 1936's Electric Hawaiian Method book by Alvino Rey. Note the little lightening bolts! Interesting how electricity was still somewhat novel to instruments at the time.
The above shows that an additional jack was added to this design for an extension speaker, the 'Echo Speaker'.
Serial #4110 stamped on metal label.
Serial #4110
All of the new upgrades as described by '36's Catalog X.
All photos on this page were taken from Gibson Catalog X, 1936.