There are a couple of small dings on the cap rim and likewise on the base of the cup. The base is stamped with the Alvin logo (worn) and'Sterling' and'200'.
The cap hinge is also stamped'Sterling'. The cup is monogrammed'NRC' (I think). Auctiva offers Free Image Hosting and Editing. The item "ANTIQUE ALVIN STERLING SILVER CASED GLASS LIQUOR FLASK REMOVABLE CUP MONO" is in sale since Sunday, August 23, 2020.This item is in the category "Antiques\Silver\Sterling Silver (.925)\Bottles, Decanters & Flasks". The seller is "chris3909" and is located in Daphne, Alabama. This item can be shipped to United States.