Swiss. 1960 Stainless steel case and band. Serial number "272635" marked on caseback. The unpolished case features sharp edges. Original crosshatched crown and band. A rare first-edition "Mark I" survivor example. Utilizes the iconic Valjoux 72 chronograph movement. Enicar's Sherpa Graph model was famously endorsed and worn by Stirling Moss and Jim Clark's Formula One racing team. This example features the rare "gladius" hands. Gross weight of assembled watch, 97 grams. 40mm case diameter. The watch was found to be running at the time of cataloguing. It has not been tested for timekeeping accuracy and may require adjustment.