According to the Queen records, the first 45's were manufactured in 1953. Here's the link.http://www.queencutlery.com/uploads/Mod ... 0-2015.pdf
Nice knife but I never owned one mainly because I never liked the pattern. Something about those aluminum handles that rubs me the wrong way.
I'm partial to bone handled knives, mainly Rogers bone.
With the aluminum handles and stainless blade, it makes a great foul weather knife or a great fishing knife.
Also....glad you liked the #10's and thanks for buying them................Bruno