Like the Aqua Graph Mark III, the MK IV appeared just a year after the its precedessor (March 1968) . The Main difference is findable at the hands. The minute counter has a orange painted thick hand and the chrono second hand is formed like a triangle and also orange. Despite that, the bezel was changed at a small detail.
| Reference Number | Serial Range | Watches produced |
| 072 – 02 – 02 072 – 02 – 02A (seen on some late watches) | 1.070.2xx – 1.070.4xx 1.305.0xx 1.317.1xx – 1.317.6xx 1.321.1xx – 1.321.4xx 1.322.6xx | ca. 1.900 |
Case
Stainless steel EPSA compressor case with bajonet lock.
40,6mm x 49,5mm without crown, 14mm thickness, lug width 20mm
Bezel
The bezel of the Mark IV is counting up from 0 to 60. 10, 20, 30, 40, and 60 is written in bigger number than the 5min steps. Every minute has a dash as indicator. The Bezel itself is made of aluminum with a black surface and numbers in silver.
The main difference to the other references is the usage of just one lume spot instead of two at 12 o’clock.
The bezel is freely turning without clicks.
Some of the later Serial ranges (starting with 1.318.xxx) can also be found with GMT bezels of the Jet Graph. Technical maybe incorrect, does it look that they were really facotory attached (maybe due to a short lag of Diving scale bezels). At the moment I investigate, why it seems that most of them come from Hungary.
Red Ring
Made of red eloxed aluminum the pointer of the ring of the MK III is formed like a house. The ring is freely turning from the bezel.
Dial
The most common dial version known is black paint with white sub dials. The Enicar logo is applied.
Hands
The MK IV uses the minute and hour hand of the MK III. New is the chrono second hand in shape of a triangle and orange paint and the subdial hand from the minute counter, which is orange too.
Minute and hour hands are baton style with white paint around the lume. Those style was very common for Enicar watches of the mid till end 60’s.
Crown
Like any other Aqua Graph Reference, the MK IV has the typical compressor style crown with Enicar Saturn on it. Although in later watches you will find crowns without the waffle pattern too.
Measurements: 6,25 x 3,75; Tap 12
Back
The back shows the Sherpa 300 logo with the seapearl in the middle.
Movement
Valjoux 72 or Valjoux 726 with golden finish
Enicar 101 