Features: First Generation Seiko Issued Royal Airforce Navigator's Chronograph. Split Second Flyback Chronograph with NATO Strap. High Quality 15 Jewel Quartz Movement. Approximately 11,000 of this 1st Model were Issued by Seiko to the British Armed Forces.
Case: Solid Stainless Steel Screwback Case with RAF Military Markings. Three Buttons Start, Stop, and Reset the Chronograph Functions. 10:00 Button Controls the Flyback Function. Push it Once While the Chronograph is Running and the Chronograph Hands Pause to Allow you to Note an Intermediate Time. The Movement Continues to Count Even Though the Hands are Paused. Press The Button Again and the Hands will "Catch Up" to Continue Timing the Event. Crown at 8:00 Sets the Time. Fixed Lug Pins. Mineral Glass Crystal. Reference 6645.
Dial: Mint Original Black Triple Register Chronograph Dial. Luminous Markers are Promethium and this is Indicated by the P in the Circle Below the Seiko Name. Register at 3:00 Counts 1/10 Seconds and Makes One Revolution per Second. Register at 6:00 is Constant Seconds. Register at 9:00 Counts to 30 Minutes.
Movement: Seiko Model 7A28A High Grade 15 Jewel Quartz Movement. New Battery Installed.
Dimensions: 37mm Diameter Excluding Crown x 44mm Top to Bottom. 20mm Lug Spacing.
Condition: Excellent Overall Condition. Comes with a 90 day Mechanical Warranty.