39mmJLC/AP Cal. 2121: ultra-thin automatic, 19,800bph, 40h PR, 36j; only 3.05mm thick; 21k gold peripheral full rotor on ruby rollers (not a micro-rotor); based on the JLC Cal. 920 (1967), shared with Vacheron and Patek2012–2022
35mmCartier Cal. 1847 MC: automatic, in-house, 28,800bph, 42h PR, 23j; workhorse Cartier automatic used across Santos and other sport-dress lines2018–present
36mmAP Cal. 2125: in-house automatic, 21,600bph, 40h PR, 33j; 21k gold full rotor (not a micro-rotor); direct derivative of Cal. 2124, a separate AP family from the JLC-derived Cal. 2120/2121; produced 1987-19971992–2003
40.5mmPatek Cal. CH 28-520 C FUS: automatic flyback chronograph with second time zone, 28,800bph, 55h PR, 34j; column-wheel, vertical clutch; used in Nautilus 59902014–present
40mmPatek Cal. 240 PS IRM C LU: ultra-thin automatic with pointer date, moon phase, and power reserve, 21,600bph, 38-48h PR, 29j; off-center mini-rotor; used in 5712 Nautilus2006–present
41mmAP Cal. 4302: in-house automatic with date, 28,800bph, 70h PR, 40j; used in Royal Oak 15500 and Code 11.59; modern AP automatic platform2019–present
41mmAP Cal. 3120: in-house automatic, 21,600bph, 60h PR, 40j; used in Royal Oak Offshore and ROO diver; AP-decorated with perlage and Cotes de Geneve2012–2019
