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Seiko

1989 Seiko 7A28-7120 Chronograph | Gen 1, RAF-issued

1989 Seiko 7A28-7120 Chronograph | Gen 1, RAF-issued

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Case Size 37 mm
Movement Quartz
Approximate Age 1980s
Dial Color Matt Black
Case Material Stainless Steel
Lug Width 20 mm
Includes Watch Only
Overall Condition This Seiko 7A28-7120 Chronograph is presented in honest vintage condition. The case retains its sharp original lines and no visible dents. The dial is in excellent condition, with no visible patina. The Seiko logo and “P” markings remain crisp and legible. The screw down caseback is engraved with the military markingss, which show light wear but remain easy to read. The chronograph functions operate smoothly, and the movement has been cleaned. The battery was also recently replaced.

The Seiko 7A28-7120 is one of the most important quartz chronographs of the 1980s. It uses 7A28, launched in 1983 - it's the world’s first analogue quartz chronograph movement, and it was the first Seiko chronograph issued by the RAF.

The dial has three sub-registers: running seconds at 6 o’clock, a 30-minute counter at 9, and a 1/10-second display at 3. The chronograph is started, stopped, and reset with separate pushers, and the split-seconds control (pusher at 10 o'clock) makes it more complicated and technical than other Chronographs of the era. 

RAF issue history

It was said that the RAF adopted the 7A28-7120 (Gen 1) in October 1984, and issue continued until November 1990, when it was replaced by the 7T27-7A20 (Gen 2). Around 11,300 pieces of the Gen 1 were supplied in total, making it one of the rarest and best known British military quartz chronographs. 

The watch was ordered to replace earlier mechanical chronographs for reliability, accuracy, and lower maintenance. The RAF version used fixed spring bars, a matte case finish, and a black dial with Promethium lume, marked by the circled “P” under the Seiko logo. 

7A28 Movement

The 7A28 family is much broader than the RAF model. Other references include 7A28-7020, 7A28-702A, 7A28-7040, 7A28-7049, 7A28-7100, 7A28-7110, 7A28-7130, and 7A28-7A00, among others.

It also appeared well outside military use. The 7A28 showed up in films such as A View to a Kill and Aliens.

Key Features of 1980s Seiko 7A28-7120 Chronograph | Gen 1, RAF-issued

*Straps not included

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Every vintage watch on our site is personally sourced by our experienced specialists, with core component checked against brand references and historical records. Each piece is sold with a guarantee of authenticity.

These are the kinds of watches we would source for our own collection: honest vintage watches with character and history. While all pieces are sold “as is” to reflect that inherent patina and age, every watch is examined inside and out before it reaches you.

Warranty and Return Policy

All of our products are covered with a one year warranty. If you experience any problems with your watch within the warranty period, will we repair it for you. Unfortunately, we do not accept returns or exchanges on purchased items.

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