Geno,
Thanks for that information, I just added it. I believe I read about a .410 Matska located in Russia. Do you know of it?
Did #177 have view/proof marks on the water table?
John
.410 gun known as Niki-II son's gun. It's located in St.Petersburg Museum of Artillery. I can't get access to this gun still, but been promissed.
All Matska's guns with Witworth steel barrels have only one proof - the first provisional proof mark, exept those guns been imported to UK and later spreaded around the world.
Buturlin's gun #257 have barrels made from Krupp steel.