Black/Cyber Weekend Watches
Ronda Caliber R150

Ronda Caliber R150

Ronda Caliber R150 Automatic

Caliber NumberR150
TypeAutomatic, self-winding
Casing Diameter
4.4mm thick
Vibrations Per Hour
28,800 bph/vph (4Hz)
Lift Angle
51 degrees
Min: 200 / Max: 315 degrees
Rotor Winding Direction
Rotor Type
Ball Bearing
Anti-Shock Protection
Hand Count
FunctionsCentral hours, central minutes, central sweeping seconds, quickset date at 3:00
Country of ManufactureSwitzerland
Known Models
(Add your watch to the comments below…)

The Ronda caliber R150 is a Swiss made automatic movement with 25 jewels. This movement was announced at Baselworld in 2016. As a manufacturer of mechanical watch movements back in the 1960s, the R150 is not Ronda’s first mechanical caliber.

Ronda Mechanical Movements:

This movement is part of Ronda’s “Mecano 100” aka Series 100 line of movements. When the R150 was launched in 2016, there was talk of a full lineup of Ronda mechanical movements to come, however, at the time of this post in 2021, the R150 is still the only movement available in this series, and the only mechanical movement produced by Ronda.

In Ronda’s own words:

“The Mechanicals product range heralds the return of the Ronda Brand’s mechanical watch movements. The recently launched automatic movement R150 operates with a winding mechanism on both sides by means of a ball bearing. – “Ronda Mecano”, available exclusively as a Swiss Made line, is intended for premium timepieces.” –source

Ronda R150 VS ETA 2824-2:

Despite some misinformation online, the R150 is not an ETA 2824-2 clone. However, the R150 does share similar dimensions with the 2824-2: both are 25.6mm in diameter with roughly the same height (4.6mm for the ETA, 4.4mm for the Ronda).


According to official documentation by Ronda, the calibre R150 is claimed to have an average accuracy rating of +/- 12 seconds per day with a maximum deviation of rate up to 30 seconds per day. Isochronism after 24 hours with +/-20 seconds per day. Ronda tests each movement in two positions at the factory. The R150 is equipped with an index system regulator for fine-tuning accuracy.

Ronda Caliber R150 Regulator

Power Reserve:

The power reserve of the R150 is about 40 hours when the movement is fully wound. According to Ronda, winding the movement by hand will reach full power reserve after ~27 winds. You cannot overwind the movement. In order to maintain constant running of the movement, Ronda recommends wearing the watch for 12 hours per day. When wearing the watch for fewer hours than 12, you may need to hand wind the movement a few times.


Ronda has a headquarters in Lausen, Swizerland as well as in Hong Kong. The Ronda R150 is labelled as a Swiss Made movement, but with the smoke and mirrors of the watch industry, it is not unreasonable to question how “Swiss” any movement actually is. For example, were all of the components made in Switzerland or only some of the parts plus assembly?

Replacement Prices:

At the time of this caliber listing, replacement prices for the R150 were found online in the range of $159.00 USD to $169.00 USD.


Additional Resources:

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15 days ago

I remember when this came out 5 years ago and it was all the hype. The blogs were all talking like this was going to take over the 2824 and sw200. Now you can barely find any watches with this movement.

9 days ago

This movement is in the new Aragon DF-42.

Venus Caliber 178
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