In the past, Hanhart supplied the Navy with chronographs, including the single-button "Calibre 40", and stopwatches. Today naval officers, leisure sailors and divers wear wristwatches or use stopwatches from Hanhart both on and under the water. The striking fluted bezel with inlaid red marking of the Primus Diver is reminiscent of the design of the watch manufacturer's legendary chronographs and is realised as a concave, unidirectional rotating bezel featuring a scale for calculating the dive time. It can be adjusted to an anticlockwise direction and has a detent set in steps of a minute.
Movement: HAN38 modified automatic chronograph movement (bicompax), based on the Valjoux 7750 calibre; 28,800 vibrations per hour, 4 Hz; 25 jewels; black PVD-coated rotor with a skeletonised, incised Hanhart logo; power reserve of min. 42 hours
Functions: Small seconds at 9 o'clock, 30-minute counter at 3 o'clock, date display at 6 o'clock
Case: Stainless steel; anodised aluminium red button; fluted, concave, unidirectional rotating bezel with inlaid red marking; convex, internally anti-reflective sapphire glass; screwed-down, internally anti-reflective sapphire glass case back; screw-in crown; flexible lugs (angle of 45°-50°); diameter 44 mm, height 15 mm; water-resistance to 10 atm/100 m
Dial: Blue; with Super-LumiNova®-coated, luminous Arabic numerals, index marks, hands and yellow auxiliary dials for small seconds and 30-minute counter
Strap: Vulcanised rubber with moulded Hanhart logo, non-allergenic; folding clasp with inlaid red marking (anodised aluminium) made from stainless steel
As 1st reported by Jorge on TZ: