Reply to "What is this Gilbert item?"

@FlyerRich posted:
Bingo !
https://digital.sciencehistory.org/works/vq27zp330

Thanks very much to train1872h and FlyerRich for the detective work to identify my mystery object, it has been sitting in a box of train bits for over 40 years with a question mark hanging over it as to what it was.

I will pass on looking for a microscope set for it, don’t have enough space to start another collection.

10/10/203:58 PM

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