Badges screw-back

Badges screw-back: 498 records in the reference, dated between 1918 and 1981. By subject: schools and universities — 135, excellence and shock-work badges — 97, unions and societies — 82, the army — 77, law enforcement — 49. By metal: silver — 494, gold — 14, bronze — 13, brass — 4. By finish: enamel — 469, gilding — 43, silvering — 1. Reference prices run from 1 300 to 974 200 roubles. Every entry carries photographs, metal, finish, fastening, dimensions and prices for each grade of preservation. The fastening — screw with nut, pin, suspension — dates a badge as well as its legend: screw-back badges are typical of pre-war and post-war issues, the pin came later. An original nut and undamaged thread raise the price noticeably.