This listing is for a misc. lot of 42 vintage chicago screw back conchos from the 1970-80's with plain edge. NOTE that there are idiosyncrasies with this shape of concho due to the way they were cut out at time of production-the posts on the back are not centered on a good many of them. Also slight variance on sizes-some conchos are closer to 5/8" and some closer to 3/4". Backs are not marked on most of these due to the size, however they are alpaca silver, which is similar to nickle silver. Most haven't been used but do show signs of handling, age, bends, scratches and patina from storage. Chicago screw backings are not included. This may make for a project lot for leather crafts, purses, halters, etc.