Like Mr. Jack Wagon, I replaced the front sight on (in my case) 63 Sharps.
The mount is like his 1859 though...I actually use a silver dime, but it was so worn no date was apparent.
It was in an old leather change snapper purse, with many 19ths. century coins including 1/2 penny's,
Indian heads & 1/2 dollars including a Stone Mountain 1/2 an several Morgan Silver dollars.
It was cut and slipped right in and staked, bad news was it was later lost as well:
I still have that purse & the other coins

sadly not the Sharps
