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Gray Instrument Co " Queen Instruments " Cast Iron Engineering Level I - Beam
Click photo to enlarge
Category
:
Science & Medicine (Pre-1930)
>
Scientific Instruments
>
Other Antique Science Equip
Uploaded by
marishell
on May 29, 2016
Known Information
Category
:
Science & Medicine (Pre-1930)
>
Scientific Instruments
>
Other Antique Science Equip
Item Id:
159610
Maker:
Gray Instrument Company
Original//Reproduction:
Original
Estimated value:
around 50 USD
More info
These were used for skyscrapers
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