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Just out of interest - what are the angle marks on the movement front ?


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16 minutes ago, vinn3 said:

very interesting mvt.,    tell more.  vinn

The top one is a New Factory Tavannes 38 (Eberle 38) from a Waltham wristwatch I just bought.

I didn't spot it at the time, but the dial states 17J and the movement 15J ! 

 

 

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s-l1600 (1).jpg

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1 hour ago, vinn3 said:

on the last watch,  i notice the "timing  lever ?",   is in full retard +.  that might mean it needs cleaning?  vinn

It certainly does, I just stripped it down today.

As you can see, there is no balance shock system, whereas the info in Ranfft shows what looks like Incabloc.

The balance cock jewel is removed by screws on the underside. 

Is this an early version of the NFT 38 movement ?  

Still0007.bmp

Edited by mikepilk
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6 hours ago, mikepilk said:

I don't have a problem - but just wanted to know what the angle marks are on the front of movements ? , e.g.

I had posted a quiz about that recently but I think nobody took it up :) 

These are for timing regulation after assembly, using a temporary minute hand, a loupe and a reference clock.
 

Edited by jdm
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43 minutes ago, jdm said:

I had posted a quiz about that recently but I think nobody took it up :) 

These are for timing regulation after assembly, using a temporary minute hand, a loupe and a reference clock.
 

Makes sense, Thanks jdm

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The marks are just a guide to see if the watch is running properly. Basically you would install the minute hand and note where the needle was. ... check again one hour later and see if its at the same mark.

Not very accurate and that's probably why you don't see this from the late sixties onwards.

Anil

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5 minutes ago, vinn3 said:

the real question is " how do i start to work on a watch"?  my answer is know how open the case back and get the stem out.

When that question was asked? When is that we ran out of military humour? 

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