Junghans J687 Lift angle

[matabog]

Hello!

Does anyone know the lift angle for a Junghans J687 movement?

Thank you,

Bogdan

[clockboy]

 

I have only these two

 

JUNGHANS	620			52
JUNGHANS	674			57

[matabog]

 yeap, I found those too

Thank you!

Bogdan

[clockboy]

The lift angle when adjusted to the exact angle on a Timographer etc. makes a very small difference so I would not worry to much. If the watch is in beat and showing good time the actual amplitude (proving it is not really low) is of little importance.

In my opinion that is.

[matabog]

I believe that from 46deg (for an ETA 6847) to 57deg (for a J620) there should be a difference

Nonetheless setting the LA at 51 deg should minimize the error.

 

Bogdan

Edited December 20, 2016 by matabog

[praezis]

6 hours ago, clockboy said:

The lift angle when adjusted to the exact angle on a Timographer etc. makes a very small difference so I would not worry to much. If the watch is in beat and showing good time the actual amplitude (proving it is not really low) is of little importance.

In my opinion that is.

This is an interesting view...

There is just a linear relation between lift angle and amplitude figure. If you have 25% difference (angles pocket watch / wrist watch), you may read 270° in flat position or 203° - more than a small difference and reason to worry imho.

Regards, Frank