Thank you for viewing. Yokogawa Electric Works Analog Tachometer YOKOGAWA PHOTO TACHOMETER TYPE 2607 This is a Showa-retro analog rotation measuring instrument. I found it at a recycle shop and was collecting it. It seems to work by attaching a reflector to the rotating body to be measured, and reflecting the light source of the main unit to measure the rotation speed. The analog atmosphere, which is not found in recent digital devices, might be a good match for the world of hobbies. Regarding the accessories, everything in the photos is included. I have checked the operation, but I have not performed calibration tests, so I cannot guarantee the accuracy. Also, it is an old item, so there is some damage. Please check the photos and consider purchasing.