Vemco V-Track Model 4 Versagraphic Drafting Machine Protractor Head. Head unit only, no other parts included. Pre-owned, clean, fully functional unit. All tension levers and detente settings click into place and hold tight, as they should. Fine hairline crack on the handle assembly that does not affect functionality (see photos). User’s manual, should you need/want it, can be found online. Overall, very nice used condition. Sold as is.