High quality Russian night vision device / residual light amplifier Cyclop-1. (H3T-1)
Night Owl Optics CYCLOP-1B Night Vision Scope Monocular Zenit 9800445 #5859 | eBay
Soviet H3T-1 CYCLOPS Night Vision Scope (HSC) | Guns & Military Artifacts Gun Parts | Online Auctions | Proxibid
Cyclop 1,5 / 85 (ROMZ) - a technical version of Helios-40-2 for use in night vision devices, adapted with an iris diaphragm. Review from Rodion Eshmakov | Radozhiva
CYCLOP-1 Night Vision Scope Monocular Zenit /w 85mm F/1.5 Lens & AP-7 IR light | eBay