Bell And Ross Caliber Br Cal 322

Bell & Ross Caliber BR-CAL 322

Bell Ross Caliber Br 322

Brand Bell & Ross
Caliber Number BR-CAL 322, BR-322
Base Caliber
Sellita SW300-1
Movement Type
Automatic, self-winding mechanical, skeletonized
Lignes 11.5”’
Height 3.6mm thick
Jewels 25
Vibrations Per Hour 28,800 bph, 4Hz
Lift Angle 51 degrees
Power Reserve 40 hours (see below)
Rotor Style
Ball Bearing
Rotor Winding Direction
Anti-Shock Device
Regulator ETACHRON with fine tuning device
Hand Count
Functions Central hours; central minutes; central sweeping seconds
Hacking Seconds? Yes
Country of Manufacture Switzerland, Swiss made
Known Models
Bell & Ross BR 05 Skeleton Nightlum (Ref: BR05A-BL-SK-ST/SST), BR 05 Skeleton Blue (Ref: BR05A-BLU-SKST/SST) (Please add your watch in the comments below…)

The Bell & Ross caliber BR-CAL 322 is a skeletonized 3-hander automatic watch movement with no date.

This movement is basically a skeletonized Sellita caliber SW300-1. It is Swiss made with 25 jewels and a frequency of 28,800vph.

Some of the topics covered in this caliber listing:


Bell & Ross has chosen to use the BR-CAL. 322 moniker in a way that could create caliber confusion. For example, the same caliber number is used for the Nightlum and Skeleton Blue models. The Nightlum is a black movement with a black rotor, whereas the Skeleton Blue is a silver tone movement with a blue rotor (the blue appearance on the dial side is made possible thanks to its blue tinted crystal).

Bell And Ross Caliber Br Cal 322

Power Reserve:

The Sellita SW300-1 was originally equipped with a mainspring/barrel configuration that offered up to 42 hours of power reserve on a full wind (the same as the ETA 2892-A2 that the SW300-1 is based on). As of December 2020, Sellita began offering what they call an Optimization Barrel upgrade which jumps the power reserve up to a minimum of 50 hours, with a typical runtime of 56 hours.

Despite the base movement specs above, the Bell & Ross manual states that: “Bell & Ross watches have a power reserve of approximately 40 hours.”

In order to reach full power reserve in the mainspring, Bell & Ross says: “After approximately 40 rotations [of the crown in clockwise direction], the watch is fully wound.”

However, the next part is concerning:

“… the winding mechanism does not have a stop to prevent overwinding.” -Source: Bell & Ross BR 05 user manual, page 5

Since the BR-CAL. 322 is based on the SW300-1, and it is an automatic/self-winding movement, it is unclear as to why it would be possible to over-wind it. Caliber Corner will reach out to Bell & Ross for further clarification.

True No-Date:

Although Caliber Corner has not had the opportunity to do a hands-on review of any watches containing the BR-CAL. 322, the Bell & Ross user manual indicated that this movement is a true no-date caliber with only two crown positions: neutral (against the case) and time-setting position (pulled out one click).

Watches with this caliber:

Additional Resources:

Search Assistance: Bell&Ross, BR-5, BR05, BR5

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