....I have sent sevreal watches for service over the years. I sent one that originally came on a white gold bracelet. I still havethe bracelet but the watch is always on a black leather strap. I sent it for service on the leather strap. Not even a blink of an issue.
I may be wrong...maybe with this 5960 the removal of the bracelet represents a "significant modification".....but I find that hard to believe STILL!! Sure, if the movement has been messed with etc etc. But even then, my 5110Y had been messed with on service once...I sent it to Patek and they told me it had been messed with and they put it right.