Help identifying Unknown Pistol Magazines

[abartpear]

Was given these (4) unknown pistol magazines. Owner did not know where or when he got them. They don't wo with anything I have. There is not a mark anywhere on them. If you know or think you know please comment.
thanks,
Allan

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[Knobgoblin]

9mm?

 

[User 1234]

They look like Beretta 92 mags, except on 92 mags the latch hole is lower.

Beretta M9 / 92FS 15rd 9mm Magazines - CHECK-MATE MAGAZINES

Beretta M9/92FS 9mm Magazines from Check-Mate Industries. Made in the US to mil-spec standards under US Goverment contract. Visit our store for more info.

checkmatemagazines.com

 

[Nwcid]

The tops look a lot like Beretta M9 or S&W mags.

 

[abartpear]

9mm?

9mm fits good. 380 is to small. Did not try 40

 

[Knobgoblin]

If we're blindly guessing, I say either Smith 59 or FEG pjk9hp mags that shipped originally with the 10 rd limiter indentations in mag bodies. Someone skilled with the grinder or dremel made Cali mags into custom, windowed standard capacity mags.