My measures come from the chamber cast, Its a very odd looking cartridge but I seem to have misplaced the casting. Comparing and searching the measurements in ECRA database I am pretty sure its made from the 6.5x53r family of cartridges made by roth as there are very few cartridges with that head and rim diameter.
ECRA data identifies 3 other cartridges by Roth 6.7x54r, 6.8x42r and 8.2x53r with the same head and rim diameters.
I know Galand of Paris was a well-known gunsmith but have seen little of the rifles he made or retailed in his shop.
