Raimey : the link you sent "https://waffen-pfandleihhaus.de/beschreibungen/964.html: is the gun I have though mine has an adjustable trigger. It is a different scope mounting though, which no doubt covers the "Krupp Special" part of marking. Apparently the cocking system is sometimes called "kickspanner" and has a variation on Kreighoffs. More searching to do to find a schematic!


All the best