A fully working, stainless steel Seiko chronograph with the original box.  Model reference A128-5000


From the serial number on the case back we can accurately date this watch to being made in February 1978.


Seiko launched the world’s first LCD watch in 1973, and continued to develop the technology.  In 1977 they launched the A128 series, including the A128-5000.  This gives you extra functionality, such as a 1/10 second stopwatch, backlight and day, date and month calendar.  You can download a full instruction book for this model here.  This watch is very honest, on the original, long Z167 bracelet and Seiko SQ clasp, and in the matching SQ box.  The glass has a few marks, and the case has not been polished so will show light scratches, but all the functions work (even the light, which rarely does).  As will all the LCD watches of this period the LCD screen is not readable at angles, as shown in the photos, but all segments work.  We will install a brand new battery before sending the watch out to the new owner.  The bracelet has been cleaned in our ultrasonic bath.

This watch will be supplied with the original 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.


Width with pushers  35.4 mm

Width without pushers  34.3 mm

Between lugs  19 mm

Lug to lug length  39.3 mm

Case Thickness  10.8 mm

Bracelet will fit a maximum wrist size of 215 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 2 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.

From 1st September 2021 we will be planting a tree for every watch we sell, working with the International Tree Foundation (Est 1922) to make this business positive on carbon.  By buying anything pre owned you are effectively reusing what already exists, but this takes it further and makes us feel good.