That's interesting! I have not heard of Thomas Sigott before.
What stamp is it who make you think it's reproofed in 98? I found the Munich proof mark toghether with the Nitro proof mark. (eagle with N) Similar to the middle and the left mark at the attached picture. The number next to the munich proof mark is 361. Each barrel has also a "similar eagle" with a M.


Last edited by Skrotnissen; 05/17/17 03:51 PM.