Hamilton Railroad Grade Pocket Watch. *This Grade 936 18s, Model 1, Class 2, with 5 adjusted positions, 17 Jewel pocket watch is prestine. The 936 is Hamilton's 1st Railroad Grade watch. It has a Classification of Class A (Advertised for RR Service, Perpetually Qualified) The movement was specifically advertised for railroad service and approved on all major railroads. The features would have qualified the movement perpetually, meeting all requirements even when general railroad specifications were modified, or the grade specifications were improved along with new railroad requirements. *Pocket watch database. The dial has a chip, the Case and Crystal are in very good condition. Works.