Browning Airstar 200 electric cocking device - rarity!

For sale are air pressure and airsoft guns as well as blank-firing guns from the estate of a collector. The guns were stored clean and dry. They were only occasionally fired in a private setting. The guns were always treated with care and handled carefully. Here is an air rifle from the 1990s "Browning Airstar 200".  This air rifle comes from first ownership and was newly purchased there in the early 90s for about 1,700 DM.  It was initially occasionally test-fired. But actually, it was always too heavy and unwieldy for the owner. Therefore, it was forgotten and spent its existence in the hallway cabinet. Visually, this Airstar 200 is in top condition. Problem: The built-in gray battery was of course deeply discharged and defective. A new battery was purchased (the black one). With it, the rifle cocks with the typical "cordless screwdriver noise". However, it does not stay cocked but relaxes again by itself after a few seconds!? It is therefore not shootable and is sold as defective for this reason. Maybe it is just a small electrical issue. However, this is not our "problem". Therefore, it should be sold as is to a knowledgeable interested party. Everything visible in the pictures will be delivered. A historically significant air rifle for collectors, sport shooters, or plinkers. The rifle was always in private ownership, no club use. Manufacturer: Rutten S.A. Herstal (Belgium), licensed production for “Browning Arms Company” Morgan Utah & Montreal P.Q., caliber: 4.5 mm (.177”) single loader, muzzle velocity (Vo): 220 m/s (manufacturer's specification), trigger: adjustable resistance.System: spring pressure with electric cocking process. An electric motor in the forestock cocks the spring via a bevel gear drive over an engaged roller chain. The cocking process takes about 4 seconds and is accompanied by a “circular saw-like” noise. Due to the comfortable and power-saving cocking mechanism, the gun naturally lacks a manual cocking lever or a break barrel. No recoil-free shot release.Electric supply: nickel-cadmium battery 7.2 V - 1,300 mAh (housed in the buttstock)Charger: 220 V / 50 Hz or 110 V / 60 HzBarrel length: 470 mm (fixed, rifled barrel)Sights: rear sight horizontally and vertically adjustable, interchangeable ring front sights, front sight tunnelOverall length: 1,155 mmWidth: 55 mmWeight: 4.2 kgDesign: walnut wood stock lacquered, system blued, two LEDs: for “battery charged” and “safety off”, electric motor housing made of plastic.Errors, typos, and prior sale excepted. This is a private sale. All warranties, guarantees, liability for defects, and returns are excluded.