Tag Heuer Stainless Steel Caseback Reference 840.306 Series 2000 Chrono
Tag Heuer series 2000 chronograph watch caseback. The caseback is stainless steel and there are some marks, which will polish out and the back has been either used or stored. The reference number on the caseback is 840.306. The caseback screw fits and measures across the outer edge approximately 33.3mm in diameter.