Recently came accross an old double in India, probably assembled by Mantons.The barrel has "Made In Germany" stamped at the top while on the underside near the chambers is stamped "GUSSSTAHL KRUP ESSEN 8.3mm 62 1/2, stm G. N 19g". There are no other markings on the rifle. I have yet to take a chamber cast but my guess is that it is a Jeffery 333 calibrated for the 300 grain bullet. Any help?
Shikari