Check the listing for details. EMMERT DRAFTING MACHINE HEAD. Condition: Used. Listed at 39.99 USD. Looks to me like this unit is fully functional. However, I have no idea how to use it. It’s pretty clean. The worm gear turns, but it is tight, perhaps by design. See photos for blemishes. There is one screw that seemed looser that necessary, and I featured a profile of it in the photos. (This might also be called an “Emmert Micromatic Protractor .”)
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