This is a genuine Soviet Military Dosimeter DP-1B from 1957. It is a unique collectible item for those interested in militaria. The dosimeter was made in the Russian Federation and is an original piece. The theme of this item is militaria, and it falls under the category of original period items from 1976-89. This dosimeter is a great addition to any collection of militaria items. Measures: 0.4R/h to 400R/h (Medium range dosimeter). Runs on 1.6V batteries.