That's exactly what I thought when I came across a Technicraft TC-2000 cartridge. Had to be a Group B stylus, after all I own 4 of them and several from Group D not to mention a bunch from the mass produced group A, so it seemed very cut and dried. Guess what, it wasn't!
Do not assume it's a Group B stylus until you see the actual number on top of the cartridge. If it turns out to be a Technicraft cartridge then a standard Audio Technica stylus will not work in it even though it looks just like a Group B stylus. You can't cut the plastic grip and make a standard AT stylus work either, the cantilever will jam up into the body and it won't work even if you do manage to get it to fit.