Both molds are blued steel 2-chamber (round and conical) construction, with "COLT'S/PATENT" atop the sprue cutters. 1) 31 caliber mold, with "31Pkt" marked on the right side of the body. 2) 36 caliber mold, with no additional markings.

Both are very fine, with 70% of the original blue finish, showing areas of brown patina, bright wear on the high points and bearing surfaces, and a few scattered dents.