Garnet was a great Canadian amp company along the lines of Traynor, very well built and underrated amps
The person I got this from claimed this Pro 200 had the stinger fuzz circuit but sadly he mistook a broken sounding amp for a standalone fuzz unit (you can find his original Reverb ad).
After taking it to my tech (who purchased Gar Gillies old schematics from his estate after he passed) I was told it’s basically a one off custom circuit that Gar put in a Pro 200 chassis, he said the circuit resembled one of his PA circuits but voiced for guitar. He gave it a full servicing but the amp has been sitting around barley used for the last few years.
This amp has two EL-34s @ about 50 watts give or take with some massive transformers (one for sure being a Hammond), the amp has great cleans, a push pull bright switch, very sensitive EQ and great overdrive, very versatile amp.
Message me with any questions thanks!