I picked this Seiko 6139-6010 up from Japan. The Serial number shows it was made in March 1969 and that means this month it turned 50 years old. The earliest I have seen are from February 69. It’s one of my favourite dial and case designs; 6139-8010 AD starburst blue with frost and red hands. This example is in very good original condition. It’s not running and I suspect it once received a good knock as the central second recorder has fallen off and the upper shock jewel is missing.

The first letter in the Serial number tells you what year it was made. (You guess the decade) and the second number tells you what month.

The Tachometer ring is held in place by the dial and has a notch to hold it in the correct position.

The dial is in excellent condition. If you look at the 2’o clock indication, you can see where the Tachometer ring is held in place from.

I have found and fitted a new upper shock jewel and spring. Here I see that the balance moves freely.

Movement coming together. It can be a little fiddly fitting the wire springs, but practise makes master;)
For now this one is a keeper.
Yep holding on to this one! Unless I get an offer I can’t refuse;)
This watch also has quick set day date function! That would also be a first in a auto chronograph.
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