inca or shock

[gary17]

Hey guys

How do i no what is a incabloc balance cock or a shock balance cock.

The pics below i know are not inca.But i dont know what balance complete to order still.

Can some one axplain how i tell the difference.

The pics below are off a tissot cal 27 inca or ?????

cheers

gary

[rodabod]

Non-Inca. Check if the staff lengths are the same by looking up online as it may be that the inca version is compatible with non-Inca. 

[rodabod]

Also, some Cal 27 have an overcoil hairspring. Yours does not.  

[gary17]

so its not inca that means its either SSR (which i hope it is) or ordinary,according to cousins which is obsolete .So its probably the one i need.

[rodabod]

Any idea what “SSR” stands for?

 

[gary17]

Special shock resist according to cousins

[watchweasol]

Hi Gary   a litte information on shock systems for you

Watch Anti-Shock Settings - Great British Watch Company.html

[LarryH]

You may be aware already, but according to Bestfit, it should be a 100/667D balance staff.  Quickfit number was 331-1.

I do not appear to have one, but perhaps that will help you find one online!