Triumph A or B question

[bruv]

I finally got this home. It is is pretty good shape. The chunk that we all thought was broken off the cabinet bottom has intentionally been cut that way, not broken off. Perhaps to accommodate a stand foot? It also has holes drilled for a cygnet mount, so perhaps I'll put it back that way. I had a question about running this machine. Does the belt tighten by using the adjuster knob in the front on the under carriage? Did these not have a tightener like the standard, etc? The machine plays fine after a bit of lubing up and tightening some bolts. All in all, I am pretty happy with it. It weighs a ton, though.

Dave