Seiko SUS Military twins

Sep 07, 2019,22:30 PM

Both from 1996.  The Seiko cal. 4S15 hacks, hand-winds, and runs at 28,800 bph.  Compare to the cal. 7S26 that later replaced it which does not hack nor hand-winds and runs at a slower 21,600 bph.  Even today's Seiko 6S and 4R series of movements run at 21,600 bph.  Soon after the SUS line was discontinued around the year 2000, the 4S series was moved exclusively to the Credor line.

Note: the stainless steel cases on this model were "pre-distressed" by Seiko during manufacturing to give them a worn-in, patinated look!

Seiko cal. 4S15

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Thanks nasseriq. Cheers! [nt]

 By: reintitan : September 8th, 2019-19:42

Thanks for posting this great pair of Seiko watches

 By: cazalea : September 8th, 2019-07:24
It goes to prove Seiko offers watches in virtually every style, size, movement that one could wish for! Cazalea

They cycle through designs about every 2-3 years on avg before a model is discontinued.

 By: reintitan : September 8th, 2019-19:42
That makes for a LOT of watch references over the decades.


 By: John-E-Mac : September 8th, 2019-09:00
What diameter are these? -John

Found. 35mm. [nt]

 By: John-E-Mac : September 8th, 2019-10:57

That's right. Same size as the JLC and IWC Mark 11

 By: reintitan : September 8th, 2019-19:41
where the creators got their inspiration from.