Slavek, Maybe you should do a little home work ! That is a Marbles barrel mounted sight, called a Number 63 with a flat top,number 64 with semi buckhorn profile or a number 65 with the full-buck-horn outline, all 3 could be had by special order!
Folks if you had the correct change there is very little Winchester would not do! Im betting a number 65 BUT I would need better photos, I have learned from several oldtimers, hardwarestore owners ect.. Again Mr Rule was correct 99% of the time BUT I have seen documented changes that are not in his fantasic book and trust me when I say he did the best job Ive ever seen on a Winchester book! the very best Winchester Poor
