Jim Dunlop JD-F2 Germanium to Silicon BC108C transistor conversion.

[Bakersdozen]

I had one of those, olive drab, big assed knobs and heavy and dirty as all get out. Loved that thing.

Yep that's the one mate. With the cool timber box it came in. There more I think of it, it's bringing back more and more memories of lugging it round to jams and gigs .. so so cool