SBT-7/СБТ-7/TUBO GEIGER MULLER CONTADORES GM VENTANA MICA BETA CANTIDAD-1

GEIGER MULLER TUBE GM COUNTERS SBT-7 СБТ-7 MICA WINDOW BETA. BUT DUE TO THE PRESENCE OF BIG / 22mm / MICA WINDOW. Thickness of the mica window - 10-11 microns. Produced on 1980's IN USSR. Length 62 mm.

eBay