Ronda R150
Factory specs
- Caliber
- R150
- Made in
- Switzerland
- Frequency
- 28,800 bph (4 Hz)
- Power reserve
- 40 h
- Jewels
- 25
- Hacking
- Yes
- Hand winding
- Yes
- Accuracy
- -12 / +12 s/day
- Diameter
- 25.6 mm
- Height
- 4.4 mm
- Functions
- Hours, Minutes, Seconds, Date
Ronda's Swiss Made automatic, announced at Baselworld 2016 as the first caliber of its "Mecano 100" (Series 100) line. Ronda's own caliber page could not be read (ronda.ch serves a bot check), so the figures come from Caliber Corner, citing Ronda's data sheet and technical instructions: 11½ lignes, 26mm diameter and 25.6mm casing diameter (recorded as 25.6), 4.4mm high, 25 jewels, 28,800 vph, about 40 hours, ball-bearing rotor winding in both directions, hand winding, Incabloc shock protection, Nivaflex mainspring, hacking seconds, central hours, minutes and seconds and a quickset date at 3, lift angle 51°. Accuracy is given as an average of ±12 s/day, with a maximum deviation of rate of 30 s/day and isochronism over 24 hours of ±20 s/day; Ronda tests each movement in two positions, and it has an index regulator. Caliber Corner says it is not an ETA 2824-2 clone, though it shares the 2824's 25.6mm diameter (4.6mm high against 4.4mm). Its 2026 update says Ronda removed the R150 from the mechanical section of its site (the caliber page is still up) after introducing the R01 series on 10 June 2026. Tier "upper", alongside the Sellita SW200 and ETA 2824.
Watches with the Ronda R150
| Watch | Price from | Movement | Dia. mm | Thick mm | Crystal | Micro-adjust |
|---|---|---|---|---|---|---|
 Aragon DM 42 (Ronda R150) |
$300 | Ronda R150 | 42 | 14 | Sapphire | — |
 Aragon Antigravity 42mm (Ronda R150) |
$350 | Ronda R150 | 42 | 14 | Sapphire | — |
 Aragon Antigravity 48mm (Ronda R150) |
$350 | Ronda R150 | 48 | 14 | Sapphire | — |
 Aragon DM Titanium 45mm (Ronda R150) |
$500 | Ronda R150 | 45 | 13 | Sapphire | — |
 Aragon DM Titanium 50mm (Ronda R150) |
$500 | Ronda R150 | 50 | 13.6 | Sapphire | — |
 Aragon Hercules 43mm (Ronda R150) |
$500 | Ronda R150 | 43 | 14 | Sapphire | — |
 Aragon Hercules 50mm (Ronda R150) |
$500 | Ronda R150 | 50 | 14 | Sapphire | — |
 Aragon EVO 45mm (Ronda R150) |
$530 | Ronda R150 | 45 | 14 | Sapphire | On-the-fly |
 Aragon Sea Charger 50mm (Ronda R150) |
$600 | Ronda R150 | 50 | 15 | Sapphire | On-the-fly |