1980 CWC G10 'Fatboy' - superb condition with LOW serial number
Fully serviced in our workshop
£545.00
Out of stock
In 1980 the Ministry of Defence procured its first quartz watches in the form of the CWC 'G10', which during that year replaced its predecessor, the mechanical 'W10' watch. The 1980-82 G10s have become known by their nickname - 'Fatboy' - due to the depth of the case required to accommodate the ESA/ETA 536.121 movement. Later generations of G10s were able to use more modern movements which were thinner and therefore the watches had thinner cases.
The 1980 issue watches had the the old 'no circle' CWC logo on the dial - the same as the mechanical W10s, but also was marked 'Quartz'. Unlike later G10s, the case back does not have any service code to designate whether the supply contract was through the Army, RAF or Royal Navy/Marines.
This example is in superb condition with only minor marks to the case and back, as described in the condition report, and has just been fully serviced. The watch also has a very low serial number, being just the 157th watch issued out of over 12,000 issued in 1980. The watch is supplied on a new ribbed 'James Bond' black and grey striped NATO strap.
The case and back have some minor marks from use but overall in excellent/near mint condition. The case back has the correct markings including the NATO stock number, serial number and issue year. The crystal is a flat profile replacement with matte tension ring fitted. The dial and hands are in near mint condition with no marks or wear and the lume is a nice light caramel colour. Please refer to the images to make your own judgement about the cosmetic condition of the watch. The images form an important part of the description.
The watch was subject to a full stripdown, clean and service in October 2025. The case parts were stripped and ultrasonically cleaned and the original ETA 536.121 movement was serviced.
The movement was fully stripped, mechanically and ultrasonically cleaned using waterless solutions and hot air dried. The movement was rebuilt and lubricated using Moebius oils. The original circuit board was faulty and has been replaced with a very hard to source OEM circuit board. Images of the movement rebuild are included in the listing. The watch hacks and sets from the crown correctly. All the gaskets were also replaced and greased, including the back gasket, the battery hatch and crown gaskets.
The watch was regulated on a quartztester machine and is running on the bench at +0.01 seconds per day, or around +0.3 seconds per month, which is well within the +/-10 seconds per month specification. Note that accuracy may differ from this when in use.
The watch is absolutely suitable for everyday use, but it is vintage watch so is not recommended for sports or use in extreme conditions. The watch has not been pressure tested so water resistance is not guaranteed. This watch is covered by our waterproof 6 month guarantee.
Issued: Yes
Issue details: UK MoD
Date of manufacture: 1980
Production numbers: c12700
Movement: ESA/ETA 536.121
Diameter: 36mm
Lug width: 18mm
Hacking: Yes
Case back: Snap
Screwdown crown: No
Bracelet: NATO
UK MoD issue
The original 'Fatboy' G10 - essential addition to any military watch collection
Original ESA 536.121 quartz movement
Recently serviced with NOS circuit board
Great condition
Supplied on new ribbed NATO-type strap
6 months non-waterproof guarantee
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