This measument device took measurements of the sample to a high level of precision. It worked similar to a microscope; however, there was a dial that permitted the adjustment of the reading scale. The lenses had markings which had to be aligned to the sample. Turning the knob would displace the markings from an edge of the sample to the other and hence coming up with a reading. Complete with Wooden Bespoke fit Travelling Case with tight locking Clasp, no Key. Device is fitted with two Measure Rules, one Rule Vernia 1-50 mm the other J.C. Chesterman Sheffield 1-250 mm. Main Cast Iron Body appears to have three options for standing positions, two Horizontal and one Vertical standing Foot Plate. Condition: All Wheel adjustments are working fine. Glass Photo Holder has reminents of Holding Tape attached. Viewing Tube can be pulled out. Surface wear marks to Paint around top of Viewing section. This item may also not be complete. Fitted with Vickers S3290. Eye Lens Cap Seat maybe missing. Other Lenses missing from Box Last Calibration date was 1999. Not tested sold as seen and described. Viewing can be arranged before Bidding. Weight: 8.2 Kgs approx ( not including weight of Box ) L: 320 mm x D: 135 mm If you have any questions I will do my best to answer them.