This piston is 49.75 mm, with piston pin and rings
Cyl.dia STD 49.00 mm
Comp. height 29.00 + 14.50 mm.
Piston length 74.50 mm.
Piston Bolt Dia. 14.00 mm Length 42.00 mm
Piston rings 2.00 x 2.00 x 2.00 mm.
Made by Mahle Germany
Found, among other things, in the lightweight Gripen around 1937-39
As well as in the German NSU