|Winding:||Automatic, Two Barrel, Uni-Directional Automatic Winding|
|Diameter:||30.00 mm (13.25 ligne)|
|Complications:||Date, Hacking Seconds, Instant Date Change, Quick Date Correction|
|Hands:||Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 2020 – Current|
Cal. 400 is a double-barrel automatic movement introduced by Oris in 2020. It features many modern features and gives the company a distinct advantage in the market. The long 120 hour power reserve and anti-magnetic properties are widely publicized by the company, as is the 10 year warranty and service interval. Unusually, it uses a lubricated sleeve bearing rather than the now-common ball bearing for the rotor, which Oris claims makes it more reliable.
One notable element of the movement is the rack and pinion style regulator, which moves a mobile stud for the balance spring. Another obvious element is the use of an eccentric clip to hold the rotor to the staff rather than a screw. The automatic winding is uni-directional, which is increasingly common in modern movements. It is likely that many of these elements were designed with cost as well as reliability in mind.
Details on Cal. 400 have been scarce and somewhat conflicting. Some reports claim that the movement measures 28 mm in diameter, which contradicts Oris’ official statement that it is 13.25 ligne or 30.00 mm in diameter. Some media have said that it measures 4.75 mm thick, though Oris has not officially released this dimension.
Cal. 400 was introduced in October, 2020, without a watch announced to house it.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.