Vintage American Optical Co. Spencer Illuminator Lamp Model 735 Slide Viewer

This is an amazing piece of real scientific history. There is a badge on the top of the base that has "AO Spenser". On the bottom you can read "LAMP Cat. NO. 2,278,916 DES. 121,585 CSA APP. This also has a sticker "Food and Drug Administration 36672".

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