What is this shock spring

[pent]

Hi All,

Pinged this shock spring last night off of the escape wheel on this watch.  Having a heck of a time finding it so it may be gone for good.  Anyone know what this is called so I can order some replacements?  I've looked at the other shock spring thread and it's kind of like this one is the only one missing of course!

 

[Neverenoughwatches]

53 minutes ago, pent said:

Hi All,

Pinged this shock spring last night off of the escape wheel on this watch.  Having a heck of a time finding it so it may be gone for good.  Anyone know what this is called so I can order some replacements?  I've looked at the other shock spring thread and it's kind of like this one is the only one missing of course!

 

Looks a liitle like an Elastor shock spring but more round. What movement is it ?

[pent]

Vantage ST550A.  Very small ladies movement.  I think the ST is standard time, which I've heard was a branch of Hamilton, but not sure.