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Quoted from watchguy.co.uk
The mainspring in the barrel is pre-tensioned. As this watch doesn’t have a manual wind, the engineers thought it would be a good idea to leave a residual tension in the mainspring, so that the watch will start up instantly when slightly wound by the auto winder. Good thinking, but yet another complication.
Once the mainspring is pre-wound by 1 1/2 turns, two little screws are put into the centre plate. This plate rides up as there is a thread in the middle when the mainspring is wound. This serves to drive the power reserve indicator and the rotor catch pin that stops the auto winder once the watch is fully wound
A watch, more clever than me ...
Held it quite puzzled for a moment in my hand, when I decided to put this one on and scratched my head ... how did it work again? How do I pre-wind it manually??? Looking at the back at the crown I was thinking: Was the crown in the back for winding? ... ...
The futurematic has mechanical “block” that’s prevents it from winding totally down
So when you put it back on, it will have a certain power reserve to get you going.
That was the penny, that dropped in my mind at a later point
I have got pictures from the hoock that is catching the rotor, to end the automatic winding, but I could not find any pictures from the parts that bring the movement to a premature hold. Have you got any pictures or do you know about an article that is sh...
Quoted from watchguy.co.uk
The mainspring in the barrel is pre-tensioned. As this watch doesn’t have a manual wind, the engineers thought it would be a good idea to leave a residual tension in the mainspring, so that the watch will start up instantly when slightly wound by the auto...
Thank you for the quotation
I came across this article. I found also a German watchmaker's article, who showed pictures of tge movement whilst servicing a Futurematic. I saw pictures of the movement parts you have quoted. The stop at the top end of winding is clear to me but not the...
I do not have a picture but I can try to explain
If you imagine the main spring in the barrel, there is a plate above the spring. The spring is wound one and a half turn, and two tiny screws are inserted to prevent it from winding completely down. The same contraption drives the power reserve display - ...
Aaahhh
I will need to look at the photos again, because all parts are in my memory. I will read your notes when looking at the pictures. Thank you!
Thank you for the picture
I need to read all my bookmarks about this watch, some time soon.
You had quite a nice example of it
I think this JL offers quite a lot. Whising you also a good time in good health.
No need to wind
You just shake it a little and it will start running. Then you turn the watch and slide the crown at the back to the centre (no lifting It!) and the movement hacks. Now you can set the time, slide the crown back off the centre and all done. This watch is ...
Thank you!
A total surprise finding at a local, traditional watchmaker. Best of all: a very fair price and the watch has been freshly serviced, too. I gave him my mobile number after buying this one .... 😀
Thank you Captain.
Yes, the condition struck me and the fact that it is from the late 1950 ies. A great piece of watchmaking and very affordable, too.
Not only a pretty face: runs +/- 0 sec. during wearing and +2 sec. leaving it overmnight.
The "constant force" character of the watch is showing its capability. Thank you for looking.
