NA: Seiko SUS GMT

merl · 23 juli 2025 om 18:53

11,5 jaar na mijn eerste NA: Seiko SUS GMT topic hierbij mijn tweede.
Toen was het er een met een zwarte plaat, nu een met een rode plaat. Vandaag dus ontvangen deze Seiko SUS GMT uit 1997.
Toen ik de zwarte had, had ik een voorkeur voor horloges met een wat grotere diameter. Het horloge is toen niet lang gebleven. Nu ik wat meer neig naar wat kleinere horloges, werd het weer tijd voor dit model.

Hieronder de tekst uit mijn vorige topic mochten jullie deze vergeten zijn :

"First a bit about the Seiko SUS line that I found here and there on the internet.
I don’t know if it’s all right, but I found it interesting.

In 1991/2 Seiko had 2 of its design engineers come up with a new line for the digital youth of the day to introduce analogue time!
The designers philosophy was this:

The eye must first draw to the hands for maximum legibility.
Then the eye must hit the dial
Lastly the eye must wander to the bezel, if need be.

This is why all SUS bezels are plain with no distraction. Another common feature was the date at the 4 position.
Another common feature was the square shaped hands. All models tend to be midsized under 38mm wide.

The series lasted for about 8 years. During this time, the SUS line included the often coveted 4S15 mil style (came in black and cream dials) auto, the 4S12 GMT model coming in 3 dial colors (black, blue and red).

Seiko fans will not doubt know, heard about or even handled a watch with the 4s movement, or its predecessor the illustrious Daini 52 movement.

Here is a brief chronicle of the 4S Series from the NZ timekeeper post.

1970 Cal. 5206 LORD MATIC (LM)
1971 Cal. 5246 KING SEIKO (KS) Vanac
1971 Cal. 5246 KING SEIKO (KS) Chronometer
1972 Cal. 5206 LM Special
1973 Cal. 5256 KING SEIKO (KS) From Special
1976 52 Stream discontinued
—————————————————
1992 52 resurrected and re-designated 4S
1992 4S35
1995 4S15 Alpinist, 4S15 Titanium Diver
1996 4S15 SUS Military
1996 4S77 CREDOR Retrograde (GMT)
1997 4S12 SUS (GMT)
1997 4S15 Alpinist, SUS, and Titanium Diver discontinued
1998 4S12 SUS discontinued
2000 KING SEIKO 4S15 Historical Re-issue LE
2002 4S Series now limited to BRIGHTZ and CREDOR
2003 4S27 BRIGHTZ
2004 4S76 CREDOR Node
2007 4S Series now limited to CREDOR
2007 4S36 GMT Retrograde

The two most famous and widely pursued watches containing the modern 4s movements are the SUS military with the basic 4s15 movement and the SUS GMT with the 4s12 GMT movement.
All 4S feature Hi-Beat 28’800 A/h movement, with integrated auto-winding–thinner in profile compared to a modular system, and allows the case to be made thinner.
Thermo-compensating balance and hair-spring come standard with the base caliber, while the higher beat rate (for Seiko) allows it to be adjusted to higher tolerance.
The movement also hacks and hand-winds. The 4S35 is best compared to the ETA 2892 in Top execution, and if it were Swiss, would likely be considered a Tracteur.
Both ETA 2892 and Seiko 4S were not made to be, but rather, born chronometers."

Eerdere modellen met een 4S uurwerk die ik gehad heb: