For the non-date version, the brand equips https://www.replikuhrenx.com/produkt-Sammlungen/panerai/ the watch with the Miyota 90S5, which has the same specs as the 9015 but without the date function. Both movements have an officially stated accuracy of ｰ10/＋30 seconds per day https://www.orologibr.com/Collezione/superocean/ but are known https://www.bestehorloges.com/product-categorie/zenith/ to run quite a bit more accurately in real life.