This Seiko SQ100 was well made back in 1989, which is why it still looks so good today.  Model reference 5Y23-8A50

HOW DO WE DATE THIS WATCH?

From the serial number on the case back we can accurately date this watch to being  in January 1989.  This movement was first used in June 1988.

CONDITION

This would have been one of the most popular watches by sales in 1989.  The reason it has lasted so well is that Seiko didn’t skimp on the quality, using mass production to drive the price down to an affordable level.  So where some watches were plated, this was fully stainless steel.  Some watches had clip on case backs, whereas this is a screw down case back to better protect the movement – the 100 in SQ100 is a reference to the 100m / 10 bar water resistance the case had when new.  This helps protect the dial too, which is very clean, and the movement that has quick set day and date.  The day wheel is in French or English.  Despite being one of the cheaper watches on our website, that doesn’t mean we have cut back on the preparation.  The original bracelet has been cleaned in our ultrasonic bath, the case cleaned by hand and the glass replaced.  We will also fit a new battery before the watch is sent out.

This watch will be supplied with our branded presentation box and our Certificate of Authenticity.

Please see the HD video for more detail.  All photos and videos are part of the description and are of the actual watch unless mentioned.  We do not photoshop any pictures, and the images are copyright of birthyearwatches.com and should not be used without permission.

​SIZE

Width with crown  35.2 mm

Width without crown  37.0 mm

Between lugs  18 mm

Lug to lug length  40.5 mm

Case Thickness  8.3 mm

Bracelet will fit a maximum wrist size of 191 mm.  The bracelet can be sized for you if you give us your wrist size when placing the order.

All sizes are approximate.

Included with this watch is a 1 month guarantee and free delivery to UK addresses.  If you live outside the UK we can still deliver to most countries.  Please see our Worldwide Shipping information, or Contact Us.   Payment can be made by most credit or debit cards, bank transfer or PayPal.

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