Gibson GSS-50 Reverb Tank question

[Louie7]

Hi ~ greetings!

There seems to be an issue with this GSS-50 solid-state 2-10 guitar amp I'm working on.
The reverb tank disappeared sometime before it came to me and I'm trying to identify the original or at least a correct replacement.

The tank could be an Accutronics or an O.C. Electronics mfg.... and the schematic for this amp only specifies something called 'RV4C'...which is probably just a Gibson part number, and not a mfg number.

IF anyone here knows the exact tank number or mfg or replacement tank, OR if someone has a Gibson GSS-50 amplifier and would be willing to look inside to see for me, or even snap a digital pic, I'd be very grateful.

Thank you... Louie7