U-boat valve?

[Weasel]

My wife's uncle gave this valve to her dad and told him he got it from a U-boat during the war. My father-in-law was going to weld it onto one of his steam pumps but I told him "not bloody likely" if it did come from a U-boat.

The handle looks very old, but the brass is pretty new looking. The company name is Lunkenheimer, and their web site states they have been in business for over 90 years. I tried sending the pics to them but their email box is full.

Ignore the teflon tape, by F.I.L. put it on.

So does anyone have any ideas about this?