HELP WITH LONGINES CHRONOGRAPH

Prometeus · Jan 12, 2019

Hello!

I would appreciate those who can help me with this watch. It has letters (Hm) and numerals that I can not recognize as measures, apparently they are not pulsations or measures of speed or distance as in other similar chronographs of Longines.

Thank you very much for any information you may add.

Radiumpassion · Jan 12, 2019

Very interesting piece. Have you been in contact with Longines Heritage?

Prometeus · Jan 12, 2019

Radiumpassion
Very interesting piece. Have you been in contact with Longines Heritage?

I've never done. Do you suggest that I get in touch with them? Do you have a link to give me? Thank you Radiumpassion!

Radiumpassion · Jan 12, 2019

You just create a user on their webside Longines.com and contact the
Heritage Department. It`s easy, and they are really nice people👍

https://www.longines.com/account/create

Prometeus · Jan 12, 2019

Radiumpassion
You just create a user on their webside Longines.com and contact the
Heritage Department. It`s easy, and they are really nice people👍

https://www.longines.com/account/create

I will do so! Again thank you very much!

MRC · Jan 12, 2019

Hm could mean Hundertstel-Minuten or hundreths of a minute as frequently found in time study stopwatches and automotive rally timers. Why the seconds hand would run at twice normal speed is a mystery though.

Prometeus · Jan 12, 2019

MRC
Hm could mean Hundertstel-Minuten or hundreths of a minute as frequently found in time study stopwatches and automotive rally timers. Why the seconds hand would run at twice normal speed is a mystery though.

Thanks MRC!

w154 · Jan 13, 2019

Prometeus · Jan 14, 2019

[QUOTE = "w154, post: 1139618, miembro: 20737"]

w154

Thanks for this contribution w 154! I had heard of the hectometer as a measure of length but I did not know that it was also used in watchmaking. This longines with this measurement system should then be rare. Today I will contact Longines Heritage for more information.

Dan S · Jan 22, 2019

Like any telemeter, I guess the hectometer scale would be related to the speed of sound, which is approximately 3.4 hm/s. So it could be used to determine the distance of a lightning storm. It’s just more common to see the telemeter scale in miles or km.

Prometeus · Jan 22, 2019

Dan S
Like any telemeter, I guess the hectometer scale would be related to the speed of sound, which is approximately 3.4 hm/s. So it could be used to determine the distance of a lightning storm. It’s just more common to see the telemeter scale in miles or km.

Thanks!

HELP WITH LONGINES CHRONOGRAPH

Prometeus

Radiumpassion

Prometeus

Radiumpassion

Prometeus

MRC

Prometeus

w154

Prometeus

Dan S

Prometeus

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