Help IDing Magnifying glass

[Goldstar1]

does anyone know what this magnifying glass is or appx age. The lens is about the size of a nickle and it slips into the other piece , it has a hole through the top stem and is made of brass but looks like lead or pewter in the hole in the stem , is it part of a larger instrument? Any Help appreciated . Thanks

 

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[jewelerguy]

the one on this link is near identical and they say it's 1930's, which I would agree with https://picclick.com/Vintage-Antique-Pocket-1930S-Old-Brass-Folding-Magnifying-142352159311.html

 

[Loco-Digger]

I still use a similar one when I am out hunting. I found it in a box of junk put out on the curb over a decade ago.

 

[Anduril]

aka "loupe".

 

[Goldstar1]

Thanks for all the help !