Questions About My No.4 Mk1 (T) Sniper Rifle

[Shootingmaster]

I fail to see what he might of done in WWII has anything to do with proof marks on my rifle. He was an avid gun collector and I have no idea when & where he acquired this piece. His collection that was being sold by the gun shop in Anchorage consisted of 150 firearms and took 2 years to sell all of them. He had recently passed away and his wife was selling these guns. I understood that some time after WWII he moved from England to North America. Thats all I know. I appreciate the info about the Mitfords.