What are these mouthpieces?

[fsgazda]

I found these mouthpieces in a bunch that were donated to my school. There are no markings of any kind on them. One is small shank and one large shank. They are pretty funnel shaped with a small throat, but I have no way to measure them.

Any ideas what they are?

[hyperbolica]

The outside cup shape is like the Olds mouthpieces used to be, but the transition to the shank looks different.

[JohnL]

Yup, they certainly look kinda Olds-ish, but not exactly. Maybe homebrew?