old PERFECT lawn/garden snips

Another wonderful old tool recently found for cheap at the junk store. This is a pair of hand-held garden snips/pruners, measuring about 8.5" long overall. The only identification on it is the word PERFECT stamped onto one side and indeed it probably is about the most "perfectly made" such tool I've ever encountered, seemingly very high quality and originally designed to last forever. It features a removable 'upper' blade (maybe of a more hardened steel, or for easier sharpening?) and a very curious 'locking nut' assembly holding its two halves together. I first thought that part might be some kind of 'ratcheting' mechanism but it isn't -- apparently only a lock for the axle so it cannot ever 'come loose' (or 'go tight'?) during use, and/or to provide for adjustment as the blade would be sharpened (thus theoretically becoming slightly thinner?) or replaced. The whole thing is made of heavy (tool?) steel except for the 'springs' on each handle, those parts are made of bronze/brass.

In a little bit of online research time I've only found one other picture of one similar tool, identical but that the handle-springs were made slightly differently to include a 'hook/clip thing' to hold the handles together. (to make it easier to 'hang' for storage?)

It just *screams* early 1900's to me but I really don't have any idea -- if anybody knows anything more about it, especially info that might give a clue of when and/or where it was made -- PLEASE speak up!!

OH...almost forgot. In case there would be any doubt (and no matter how old it is now) it still WORKS PERFECT, too. I think I can now pretty safely say that I'll never need to buy a pair of garden snips again...? :-)