Tecnotempo "TelemetriX" Swiss Automatic Chrono. The watch is brand new, elegant and classic, with no scratches or signs of use. The watch is looking for the right hand. It is unique, piece number 6/300. Case diameter: 40mm (excluding crown) Case thickness: 15.2mm Strap width: 20mm The circumference of the watch is approximately 21cm. Tecnotempo "TelemetriX" Landeron Swiss Automatic Movement Stainless steel case 30 minute chronograph Sapphire crystal Telemeter function: The telemeter is used to measure the distance between the observer of a phenomenon (such as lightning) that is first visible and then audible. The measurement is based on the speed of sound (343 m/s). For example, to determine the distance of lightning from the wearer of the watch, start the chronograph when the lightning appears; then stop the chronograph when the thunder is heard and the chronograph second hand will indicate the distance in Km on the telegraph scale. Screw-down crown Date (to avoid possible damage to the watch mechanism, do not manually change the day/date with the crown if the watch time is between 8:00 PM and 3:00 AM; this is a rule valid for all watches with date) 316L stainless steel case Leather strap Made in Italy.