EARLY 1900s BRASS MONOCULAR OR MONO SCOPE PIECES POSSIBLY MAGNIFIER?

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EARLY 1900s BRASS MONOCULAR OR MONO SCOPE PIECES POSSIBLY MAGNIFIER?:
$49.99

I RECENTLY PURCHASED A LOT OIF OLD MAGNIFIERS AND SCOPES. THESE THREE PIECES WERE IN THE LOT IN A SEPARATE PLASTIC BAG AND I BELIEVE MAY BELONG TOGETHER, BUT AM NOT CERTAIN. I WAS TOLD THAT THIS IS CIRCA EARLY 1900s, PROBABLY 1920s/1930s ERA?

IT SEEMS TO BE MADE ALL OF BRASS AND GLASS.

I AM NOT AN EXPERT, SO PLEASE TAKE A LOOK AT THESE PHOTOS...THIS SEEMS TO BE A VERY NICE COLLECTIBLE, BUT I AM NOT CERTAIN WHAT IT BELONGED TO.

NOTE: MAKE ME A DECENT OFFER AND THIS IS ALL YOURS! SINCE I AM NOT CERTAIN ABOUT THE VALUE, SO ALL OFFERS ARE WELCOMED!

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