Conn Tubes Organ mono amplifier

Front view
Unknown mono block top view1

Tubes list: 2X 5U4G, 4X 6L6G, 1X 6SN7, 1X 6J5
Rear view Mono block

-Year(s):Early 1950's design
-Power output: around 40 Watts
-Tubes list: 2X 5U4G, 4X 6L6G, 1X 6SN7, 1X 6J5.
-Frequency response: N/A
-Preamp controls: None. Input volume only
-Speakers connections: 2 (monophonic output)
-Extra informations: Input adapted for monoral RCA plug. (aux)
-Case: Metal.
-Weight:
-Status: In hand. Was working 10 years ago. Not tested recently.