Butt is mounted by massive bolt inside.
Stella 523
Technical Specifications
Overall Lenght 1 105 mm
Manufacturer Kotek Krnsko
Barrel Lenght 490 mm Type piston with break barrel
Sight Radius 450 mm Manufactured Pieces not available
Weight 3,05 kg Production Period 193x-195x
Caliber 4,5 mm

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

Airguns Stella have been manufactured by company L.Kotek - Krnsko before the WW2. Company has been incorporated with national enterprise Amati Kraslice short after the WW2.