Just about to order from Cousins a Rolex Oyster Quartz caseback tool (assume it's the 29.5mm diameter die?) enabling me to change the battery myself but will likely also need a new gasket and not sure what size or type of seal/gasket is required until the back is off.

Can someone please advise which of Cousins 'mixed bags' of seals/gaskets I need to order to match whatever seal is currently fitted?


I'm not buying the whole set of dies just the one die and wrench for the time being and will order Cousins 'own brand'.

Thank you