receiver size: 1940s Conn euphoniums

[arpthark]

I am borrowing a friend's Conn 84I (4 top-action pistons, upright tall bell) euphonium.

Was there an in-between size for mouthpieces on these?

Small shank goes in quite far, but large shank doesn't fit.

Are these designed for something a bit larger than small shank?

This one is satin silver and marked USN on the bell. A gorgeous horn, and it plays VERY well, although just barely up to A=440.

Maybe I can convince him to sell it to me...

[DonO.]

Euphonium mouthpieces now come in three different shank sizes. Small (same as tenor trombone), medium or Euro shank (older Bessons and Willsons) and large (same as bass trombone). However, I have heard that some of the old American made horns had a unique receiver. Kind of medium-ish, but Euro shanks don’t quite fit either. I think I remember hearing that Olds, Reynolds, and Conn used this size back in the earlier part of the 20th century. Maybe a Euro shank would be close enough, or be trimmed to fit?

[WC8KCY]

Could this be a Conn "Remington shank" horn?

[bloke]

old Besson-B&H/English/intermediate/Willson 2900 shank size

This is probably that:

https://www.ebay.com/itm/304688478574

' pretty sure I see places where it could easily be shortened.

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