Hi Anzac. It looks like it started out as a KNIL cavalry carbine. Approx 10,000 were produced. This was the only colonial carbine to have a magazine fairing. KNIL carbines also had the turned down bolt handle. To confirm this it should have a cut out in the left side of the butt for a ring swivel. I have seen stocks for sale from time to time. It might make a good project. The barrel should measure 431mm from the receiver to the muzzle if it hasn't been cut. The fore sight could be be re-soldered. You don't find many colonial arms with good metal work. if you need further information let me know. Regards Ian