Unusual longines chronograph

[jjea]

Does somebody know what is for the backside of this chronograph?
When you start the centered second chronograph hand, the larger backside hand also starts but in a back clockwise way!!
Thanks for all your comments
Javier

 

[Dr. Jon]

The back side is a tachometer. record the time of an event . If the hand does not complete a full circle the outer track converts to events per hour.

The smaller hand counts the number of center hand rotations. The the count is three you use the third track to convert to events per hour.

 

[jwolf]

Very interesting chrono. A double dial?? Neat watch - I'd love to see a photo of the movement.


Jim Wolf
Director of Watches
Heritage Auctions
www.ha.com

 

[jjea]

- I'd love to see a photo of the movement.


Jim Wolf
Director of Watches
Heritage Auctions
www.ha.com[/QUOTE]

I will work on it,
have you seen a watch like this before? in your opinion, it is unusual or rare?

Javier

 

[Jeff Hess]

It is a yachting watch.

common movement....though..

jeff hess

 

[vaa]

Hello! Hope this thread may be reactivated… I also have one - sold in 1930 to my father. I discovered it apparently untouched since the late 1950s. An emotional charge but also a beautiful piece of watchmaker's art; so I tried to have it repaired. Longines refused to, unfortunately they informed me too late why: it had been repaired unprofessionally at some time (after what appears to have been a bad fall which shattered a glass, broke the balance staff, dinged the tachometer face). In the meantime, a watchmaker in DE (authorised and expensive) has done a surprisingly halfhearted repair I'd have quite a few questions about. Any advice would be welcome… Perhaps also a source for spares or a professional who can repair it as it seems to deserve. And of course also anything you may know about the movement, function, history of this model. I'm attaching a photo of the movement, unfortunately I do not have any of the other side.

 

[Greg Frauenhoff]

For no really good reason I picked up this yachting timer. Looks to be a reasonably old one. Many of such timers date from the 40s and on.