the 10,75 x68 was allways in use and is till this days. was in contakt with an indian hunter some years ago. he was looking for 10,75 ammunition or components.
also remember a winchester 95 in 405 win with manton/calcutta on the barrel.
take a look into the 1925 manton catalog: original 430 mauser(10,75x68) 220 Rs.

425 westley richards 850 Rs.

404 vicker's 675 Rs.

416 rigby 1275 Rs.

they are making new enfield sporter today in india for a cartridge called(I believe).315 which is in fact the old 8x50R austrian mannlicher. have to look in the old kynoch cartridge list where this round have the same odd designation IIRC.