This is a Keuffel & Esser model 71-1010 Paragon jig transit in very good condition. The only defect is crazing on the edge of one reticle. While cosmetically unpleasant, this crazing does not affect calibration or use in any way. This instrument has been cleaned, lubricated, and adjusted for accurate performance. Elevation axle is threaded to allow mounting of accessory mirrors for auto-collimation. Also included is a user's manual and sunshade.