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Seiko RAF GEN2 Chronograph Ref 7T27-7A20

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At the request of Her Majesty The Queen’s Royal Air Force, Seiko produced the RAF 7T27-A20 Chronograph timepiece for the British Military during the 1990s.  The watch design followed the needs required by the Ministry of Defense. It included a quartz chronograph movement, a sand-blasted case with fixed military bars, and the unique use of Promethium lume on the dial.  
  • Brand | Seiko
  • Reference | 7T27-7A20
  • Movement |
  • Model | RAF GEN2 Chronograph
  • Strap | Nato Strap
  • Crystal | Sapphire
  • Style | Chronograph Watches
  • Case Width | 38mm
  • Case Height | 9.7mm
  • Lug Width | 20mm

More About The Seiko RAF GEN2 Chronograph Ref 7T27-7A20

The History

Seiko began its rich history in 1881 when Kintaro Hattori opened a shop repairing and selling watches in central Tokyo.  Eleven years later, he opened a factory called the Seikosha Factory and began building wall clocks and pocket watches.  After an earthquake and fire destroyed the original factory, Hattori reopened with a new vision, which became the beginnings of what we know as Seiko today.  A true pioneer in watchmaking, Seiko developed the first Japanese-made divers watch.

The Watch

The RAF GEN2 Chronograph features a sand-blasted 38mm stainless steel case with a sapphire crystal and is powered by Seiko’s quartz chronograph 7T27 movement.  The matte black dial features three registers at the 12, 6, and 9 o’clock positions, Promethium lume on the hour markers, hands and numerals, and a date window at the 4 o’clock position.  The case back features the British Military Issue numbers and the Broad Arrow marker.  

The Details

This Seiko RAF GEN2 Chronograph 7T27-7A20 dates to 1996, based on the case back markings.  The case and lugs appear to be unpolished and in a condition consistent with the age of this timepiece and are visible in the photographs.  Included with this timepiece is an aftermarket canvas NATO strap.