Hard to find US Glass AMBER two cup measure.  It is notched inside to accommodate the Reamer insert.  If you find the one that fits this cup you have a quite valuable set.

This cup is in excellent condition with no chips/cracks.  A couple of very tiny manufacturing fleabite  type depressions on top inner rim (very, very small and hardly worth mentioning).

Shipping in lower 48 States = $9.50