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I have a customer's Longines in for what is probably an overhaul.
Its a nice manual wind with a ss case. Unfortunately the bezel is missing.

Anyway on the side of the case is stamped "USE FACTORY SPANNER":eek:

Its the first time I've seen that on a watch case.
 

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Quite a lot of Tissots used to tell you to use a particular "key" to open them.

The Omga 1250 tuning fork actually went one better on tools - rather than telling you what to use it included the gauge for setting the index pallets in a little compartment inside the movement :grin:
 

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Seiko case backs are marked with the tool to be used to open them. For example, the 7S26-0020 is marked "A0".
 

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Discussion Starter #5
Quite a lot of Tissots used to tell you to use a particular "key" to open them.

The Omga 1250 tuning fork actually went one better on tools - rather than telling you what to use it included the gauge for setting the index pallets in a little compartment inside the movement :grin:


Interesting.

Nice that Omega did that for all watchmakers rather than the attitude they have to non Omega service watchmakers now:(

Any photos of tuning fork watches are purely academic to me as looking at them is as close as I ever want to get to them:undecided:
 
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