Hello everyone and thank you to Chronotrader for the space.
Here for sale a very rare and super early Seiko 6139-6000 for the
Japanese Domestic Market (JDM), aka Speed-Timer.
With a serial number starting 93 (full serial is 932XXX), it has been produced in March 1969 and hence it is one of the very very very first Seikos
6139-6000 as well as one of the very very very first
chronographs with automatic movement: in March 1969 neither
Heuer (with the Buren 11), nor Zenith with the El Primero had
started to commercialise and sell their automatic chronographs
yet.
These very first Seikos 6139-6000 were only sold in Japan and have
a series of characteristics that make them unique in the 6139
production through the years:

- Speed-Timer in red on the dial at 12 o'clock
- Dual language day of the week indicator with Sunday in red
- "Water 70 Proof" on the dial at 9 o'clock
- Particular "serif" font for the 10, 20 and 30
numbers in the chronograph minutes subdial at 6 o'clock. This is
true only for the first ~3 months of production, after that the
serif disappears
- "Waterproof" engraved on the case back after 6139-6000
- "botched" case by the crown, as typical in early 6139s
- 2-colors central chrono hands (silver and red)

Everything in this watch a part from the bracelet (original Seiko
but more recent aftermarket replacement) and perhaps the glass
(but I am not sure it might be original) is original and as you
can see from the pictures the conditions are incredible. Case
probably never polished, with some dings and scratches as it is
normal for an almost 50y old watch but in overall very good
conditions, dial is pretty much perfect and also the lume is in
very good conditions.
I don’t know the date of last revision of the movement but it works
properly, keep time and chrono works just fine. Also the date
changes and all the functions of the crown work ("light
push" to change the day of the month, "Hard push"
to change also the day of the week and by turning the crown up
or down while not pushed out the inner outer track moves
around).

Speed-Timers are rare, but the ones dating in the first 2-3 month
productions are incredibly rare and this one is also extremely
well preserved. For this I am considering offers above 800 EUR
and if some one offers 1.2k EUR I will take it off the market
immediately and give it to him.
I prefer bank transfer but I also accept PP (+5% on you), but in
this latter case I only send to the PP verified address.
If you are based in London you can also inspect the watch and pay
upon collection in cash if you prefer.

A few pictures: