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Gray Instrument Co " Queen Instruments " Cast Iron Engineering Level I - Beam

Gray Instrument Co    Category : Science & Medicine (Pre-1930) > Scientific Instruments > Other Antique Science Equip
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Gray Instrument Co Gray Instrument Co Gray Instrument Co Gray Instrument Co

    

Uploaded by marishell on May 29, 2016
        
Known Information
Category : Science & Medicine (Pre-1930) > Scientific Instruments > Other Antique Science EquipItem Id: 159610
Maker: Gray Instrument CompanyOriginal//Reproduction: Original
Estimated value: around 50 USD
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These were used for skyscrapers
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