Doxa watch sub 300t t graph professional 635189692892 the sub300 t graph is available in orange dial professional or black dial sharkhunter models also available with two different bezel styles the original no decompression dive table or the new sapphire elapsed dive time with luminous numbers the bracelet clasp has a push button release as well as a ratcheting wet suit adjustment the sub300 t graph is the first modern interpretation of the original dive chronograph from the late 1960s the