I have found myself the proud owner of a 2-1/4 By 3-1/4 glassless negative carrier that I would like to get rid of, but do not know how to advertise for it. It is 8-1/4 inches in diameter, hinged, and registers using four small pins on the bottom. It has the number 2434RN punched on the top. I have attached 3 pics. I want to say this is a besler carrier for their 4X5 enlarger. But do NOT know. Can someone identify it?