Technical Specifications
Overall Lenght 1 110 mm
Manufacturer Dusek Opocno (after nationalization?) 
Barrel Lenght 490 mm Type piston with break barrel
Sight Radius 400 mm Manufactured Pieces not available
Weight 2.7 kg Production Period 194x
Caliber 4,5 mm

Rear Sight Side View
Rear Sight Top View
Front Sight
Trigger and Trigger Guard

Airgun marked only with Roman II without DUO emblem. Newer variant without metal buttplate (former holes for buttplate screws are blinded).  Rear sight elevation can be chaged with adjusting screw.