Service: EternaMatic Triple Date Chronograph / Valjoux 7751

IMG_0658Steve sent in his EternaMatic Triple Date for a service. This watch has quite a few complications:

  • day
  • date
  • month
  • moon phase
  • 3 register chronograph
  • automatic
  • 24 hour hand
  • sub-second hand
  • hacking second
  • quick-set date
  • quick-set moon phase
  • quick set day

From the top: the top sub-dial shows the day of the week on the left, and the month on the right. A lot of triple dates require you to manually forward the month, but this one does it automatically on every 31st. If the month is shorter, you have to advance the date by hand. It also has a hand for the minute recorder of the chronograph.

The sub dial at 9 o’clock has a short hand showing a 24 hour display (just in case you can’t tell if it’s day or night) and a longer second hand.

The date is shown by a central date hand with a crescent shaped red end.

The sub dial at 6 o’clock shows the moon phase, and the hour recorder hand. A total of 8 hands!

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Service: Accurist Marin Graf / ETA 2452

IMG_7849Mitka saw this watch on eBay, and as he knows that I quite like Accurist watches, he pointed it out to me. The seller claimed that these watches were never sold, as the screw-down crown violated the Rolex patent at the time, so the watches were destroyed. A nice story, but I couldn’t find out if that was true or not. I’ve written to Accurist, but haven’t gotten a reply so far. Continue reading

Repair + Service: LeCoultre FutureMatic calibre 817

IMG_7319Ethan from Shanghai sent in this LeCoultre Futurematic. If you are a regular reader, you have seen one of these before on this blog.

The LeCoultre calibre 817 is one of the weirdest movements around. The auto winder and power reserve construction are over-engineered and also not very durable. LeCoultre used a non-automatic hooked mainspring, so in order not to break the mainspring, the winding weight is held to the side with a hook to prevent overwinding. Once the watch winds down a bit, the hook releases the winding weight again… Continue reading