http://www.ozvalveamps.org/stud.htm | Created: 23/11/06 | Last update:
“Designed & manufactured by Studio Instruments Melbourne”
50 watt 1 x 12-inch. Not a valve one though . . .
Source: Music Swop Shop
Those knobs, the front panel screen-printing, the illuminated rocker switch. This reminds me of a Savage.
If you have any information about these amplifiers please see How to Submit.