I would not say it was impossible the bores are chrome, but if so my bet would be post 1890. However just give the bores/ or one of them a good degreasing & dip a Q-tip in some cold/touch-up bluing. Make a swipe with it in the bore & if it takes, it Ain't Chrome.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra