In late 1970, for a brief period of time, Seiko produced the proof / resistant 6139-6001 model of chronograph. They came in a non-notch case produced for the taller 6139B movement, but with a 6139A. This example is from October 1970. It is unserviced.

• Extremely nice dial and handset

• Perfect white lume, and I mean perfect.

• Dial surface is excellent with bright clean printing.

• Marker tops are clean and shiny, as is the date window.

• Unfaded indicator ring with perfect lume, in new condition

• Bright and physically clean 6139A movement is in fully functional condition, unserviced.

• Chronograph hands reset to zero as they should. Chrono hands are a service set installed at a Seiko service center, based on the Seiko ‘SII’ service stamp inside the caseback. Hands are excellent, in new condition, in the darker tomato red. Sweep is the one-piece later type.

• Spanish / English daywheel

• Brushing on the case top is smoothed down but still present.

• Case sides and caseback show wear but no abuse. Case lines are sharp.

• Crystal is excellent, unmarked. I don’t know if it’s the original crystal or a replacement. Excellent clarity, looks great.

• Aftermarket H-link bracelet is full length, will easily fit an 8” wrist

• Servicing is available separately