The fourth Jet Graph generation was produced from August 1969 till the end. The last Jet and Sherpa Graph generation is characterized by its red or orange triangle second hand and the orange chrono minute counter.
Reference Number: 072 – 02 – 02A
1.318.1xx – 1.318.9xx
1.321.1xx – 1.322.8xx
Stainless steel EPSA compressor case with bajonet lock.
40,6mm x 49,5mm without crown, 14mm thickness, lug width 20mm
The Jet Graph MK IV has a aluminum GMT Bezel with numbers from 1 to 24 whereas numbers from 6 till 18 are black on a silver base and from 18 to 6 vice versa.
The bezel is freely turning without clicks.
Made of red eloxed aluminum the tip of the ring is formed like a little house with a whole in the middle. The ring is freely turning from the bezel.
All MK IV Jet Graph come with a black dial with white subdials. The Enicar logos is printed at 12 o’clock.
Minute and hour hand of the Jet Graph have the typical baton style of the Enicar hands from the end of the 60’s. Silver with a nice white paint that boarder the tritium lume over the whole length.
Compared to its predecessor the MK IV second hand comes in triangle style in red or orange color.
The subdial hands have all the same size and are painted. The chrono minute and sometimes the chrono hour hand are painted red or orange.
The GMT Hand is red and black in checker style.
The MK IV usually has no waffle crowns with the saturn on it but you will find waffle crowns too.
Measurements: 2,65mm x 3.75mm; Tap 12
The back shows the Sherpa 300 logo with the seapearl in the middle.
Movement: Valjoux 724 with golden finish and GMT complication.