This is a very nice horn...
The trigger is intact with thumbhook and both thumb screws (the spring loaded captive adjuster and the locking nut). Usually, if the trigger is intact, it only has one screw (like mine). Further, the seller indicates he has the stock mouthpiece adapter so one could use any tenor shank mouthpiece. I have an original Conn Connstellation Remington shank mouthpiece in two-tone gold and silver as well as an adapter. I also use a Wick 5BM medium shank (two tone gold/silver) that I had to file down so it wouldn't bottom in the Connstellation Remington receiver.
By the way, if anyone in New England is interested, my 24I is much like this one, with original lacquer and case and complete, trigger, plus I have the 25I straight bell and case. I'd be willing to sell for the right price!....I would also include the adapter, Conn mouthpiece, the Wick 5BM, two bells, and two cases. No shipping though, you'd have to come pick it up!!
Doug
Adams E3 0.60 Sterling bell - Prototype top sprung valves
Concord Band
Winchendon Winds
Townsend Military Band