1983 Seiko 7A28-7020 'James Bond'

This example is in overall good and clean condition, with general minor marks and signs of wear to bezel, case, back, bracelet and clasp. The crystal has been replaced and is unmarked. The dial, hands and chapter ring are all in mint condition. Please assess the cosmetic condition for yourself from the images which form an important part of the description.

The watch was overhauled in May 2026.The case parts were stripped including removal of the pushers, and ultrasonically cleaned. The pusher gaskets have been replaced, greased and the pushers refitted. The crystal was replaced with a new OEM crystal gasket used. The movement was fully stripped, mechanically and ultrasonically cleaned using waterless solutions and hot air dried. The movement was rebuilt and lubricated in accordance with the Seiko technical manual and a new Seizaiken (made by Seiko) 394 battery was fitted. The back gasket and crown gasket have also been replaced and greased.

The watch has been tested and is in full working order with all functions operating correctly including chronograph start, stop and reset, test function, lap timer and manual chronograph start position adjustment. 

The watch has been regulated on a quartztester machine and on the bench is running at +0.7 seconds per day, equivalent to +2.1 seconds per month, within the +/- 10 seconds per month specification. Note that accuracy in use may differ from this figure. Sample images from the service and an image of the watch on the quartztester machine showing the readings have been included in the listing.

Issued: No

Issue details: N/A

Date of manufacture: JuAprile 1983

Movement: Seiko cal 7A28

Diameter: 37mm

Lug width: 20mm

Hacking: Yes

Case back: Screw down

Screwdown crown: No

Bracelet: Stainless steel

Finish: Brushed/polished

Other features: Chronograph centre sweep hand, 1/10 second counter and minute counter, lap timer and chronograph test function, bidirectional rotating bezel

You will find many examples of Seiko 7A28s on offer, but very few of them have a recent photo-documented overhaul. 

While the 7A28 is a robust and reliable movement, it is also complicated, with 4 separate step motors to operate the different time-keeping and chronograph functions. Over time, dirt and moisture can get into the movement via perished/dry gaskets, and the lubricant begins to become dry and gummy. The cumulative affect is to cause friction in the mechanism which results in faults with the different chronograph functions. If left unresolved this will cause excessive wear in the movement and the problems will only become worse. Dirt also builds up inside the pushers, which then holds moisture which can get into the movement, and which can stop the pushers from correctly functioning - so the case and pushers also need to be stripped and cleaned for the watch to remain in good working order. Even if the watch is sold in good working order, with an unserviced watch it's just a question of time before it will need attention - and that could be expensive (a full service can be around £250).

If you buy a serviced 7A28 you have peace of mind that the watch is not only in full working order but clean, lubricated, regulated for accuracy and good for many years to come

• cal 7A28 - world's first analogue quartz chronograph movement

• James Bond connection

• Recently fully overhauled

• Excellent condition

• Long bracelet with removable links and micro-adjuster

• 6 months non-waterproof guarantee