With thanks to Nick for the following information:
Walther LGR overview:
Introduced in 1974 LGR = Luftgewehr Rückstossfreie =Air rifle Recoilless
LGR - The standard model, Beech wood stock, pistol grip and extreme fore end are stippled.
LGR Match - Walnut stock. Compared to the standard model, extensive stippling on the fore end extending from the trigger guard to the cocking lever handle, higher sight line (for head up shooting style) supplied with front and rear sight riser blocks. Slimmer and more upright pistol grip , no thumb groove on pistol grip.
LGR Laufende Scheibe (Often referred to as the RT or Running Target, Walther use the terminology Moving Target) – Distinctive thumbhole stock, adjustable height cheekpiece, wooden butt plate, no open sights and a single stage trigger.
LGR Match Universal – Introduced May 1980(1), generally as Match model but featuring a detachable cheek piece to vary the sightline height. Originally 3 cheekpieces were supplied, broadly replicating the Standard/Match/Moving Target sightlines, by the end of 1980 only two were supplied (2).
1983 saw a new adjustable riser system for the cheek piece, offering more adjustment (see manual p.12 &13 for details).
LGR Match Junior – Announced May 1980 (1), available early 1981. Reduced stock dimensions for the junior shooter, butt and fore end shortened, pistol grip to trigger distance also reduced. Supplied with the lighter 150g muzzle weight.
Walther LGR replacement cocking knob (3D printer drawings)
With many thanks to Mark for these drawings, which he made up for a 3D printer.
The 3D model is hosted here:
The details he gives are:
This is a replacement cocking arm handle for a Walther LGR Air Rifle
I have not been able to buy this as a spare part as they are no longer manufactured.
The Walther LGR air rifle was developed by the German arms manufacturer Carl Walther GmbH Sportwaffen as a high end match rifle for 10 metre air rifle competition shooting. The LGR was the first match air rifle that employed the then futuristic single-stroke pneumatic method as power source.
Filament: see text PLA Brown
The original nuts and screws can be used, the nuts can be pressed into the holes using a hot soldering iron.