A superb and increasingly collectible Seiko Gen 2 British Military Issued Chronograph reference 7T27-7A20, presented in original, untouched condition with all military issue markings clearly visible to the caseback.

Originally supplied to the Royal Air Force (RAF) and manufactured to Ministry of Defence specifications, this is the genuine military version featuring the correct fixed lug bars, distinguishing it from the civilian models that closely resemble it. Honest, functional and full of character, this is a fantastic opportunity to acquire a piece of British military history at an accessible price point.

Key Details

• Model: Seiko Gen 2 Military Chronograph
• Reference: 7T27-7A20
• Year: 1999
• Case Size: 38mm
• Case Material: Stainless Steel
• Dial: Black
• Hour Markers: Luminous baton markers
• Hands: Luminous hands
• Functions: Hours, minutes, seconds, chronograph, date
• Crystal: Hardlex crystal
• Movement: Seiko 7T27 Quartz Chronograph
• Water Resistance: Military specification (not guaranteed due to age)
• Strap: Blue textile strap
• Wrist Size: Fits up to approximately 21cm wrist
• Guarantee: 12-month mechanical / electrical guarantee

Military Caseback Markings

• 7T27-7A20 – Model Reference
• 4N2158 – Seiko Serial Number
• 6645-99 – NATO Stock Number & UK Country Code
• 8149181 – Ministry of Defence Code
• 2176/99 – Year of Issue (1999)

Condition Report

Case: Original condition with all military engravings remaining clear and legible.
Dial: Well-preserved original dial with strong military appearance.
Crystal: Showing some scratches and wear consistent with service life, intentionally left untouched to preserve originality.
Caseback: Excellent condition with crisp military markings.
Strap: Modern blue textile strap in good condition.
Overall: An honest and authentic military-issued watch that retains its character and originality.

Working Order

Recently fitted with a new battery.

Quartz chronograph movement operating exactly as intended.

All functions tested and working correctly.

Supplied with our 12-month mechanical / electrical guarantee.

Our View

The Seiko RAF chronographs have become some of the most sought-after military watches of the last decade. Built to Ministry of Defence specifications and issued for active military use, they offer genuine provenance and functionality without the high prices often associated with military-issued Swiss watches.

This example has wisely been left largely untouched. The scratched crystal and honest signs of service only enhance its military appeal, while the sharp caseback markings provide confidence in its authenticity. The fixed bars, military codes and robust Seiko quartz movement make this a true tool watch in every sense.

An affordable and increasingly collectible RAF-issued chronograph that deserves a place in any military watch collection.