Hand-wound mechanical, P.5000 calibre, 15 ½ lignes, 4.5 mm thick, 21 jewels, Glucydur® balance, 21,600 alternations/hour. KIF Parechoc® anti-shock device. Power reserve 8 days, two barrels
Source: Panerai Radiomir California PAM 1349 Manual Wind | US Panerai Official Website