just bought my first 303, looking for info as to model and historical significance. end of barrel says CAI or L STALBVT. underneath that 303b UK. date says 1944 im assuming serial#E2888. on the safety,by the magazine loop and above the date it says M/47C. it has the "FTR" and i know that means factory repair. looks like on the left side of reciever P30109. any help would be greatly appreciated.