The person whose watch this thread concerns (also a member here) has been informed that, as he was not the original purchaser of the 5396R – dropped off at HSWA by his bother-in-law, with a datewheel problem (a known issue with the SC 324 movement) – the remaining manufacturer warranty no longer applied.
This is contrary to how the rest of the world works (by and large) for other secondary Patek owners (or owners of pieces gifted to them by family/etc), and as far as I’m concerned, contrary to existing consumer law in the USA under the Magnuson-Moss Warranty Act of 1975.