Ronda Caliber 505

Manufacturer	Ronda
Caliber Number	505
Movement Type	Quartz, battery-powered
Lignes	10.5”’
Total Diameter	23.9mm
Casing Diameter	23.3mm
Height	3mm
Jewel Count	1
Frequency	32,768 Hz
Accuracy Rating	-10 ~ +20 seconds/month
Battery Cell	371
Battery Life	45 months
Hand Count	3
Functions	Central hours; central minutes; central seconds; date at 3:00 (also possible at 4:00, 4:30, or 6:00)
Hacking Seconds?	Yes
Country of Manufacture	Swiss made or Swiss parts
Known Models	(Add your watch to the comments below…)

The Ronda caliber 505 is a 3-hander quartz movement with a date. Ronda markets this calibre as a repairable movement with a very powerful stepping motor.

Swiss Made VS Swiss Parts:

Unlike many other Ronda movements, there is no way to visually determine the country of origin by a quick glance of the color or jewel count. Both the Swiss Made and Swiss Parts versions are nickel plated (silver tone) with 1 jewel. To figure out which version is in your watch, you will have to look for the country of origin text on the movement itself.

Ronda 505 VS 505S:

There is a similar caliber 505S with the main difference being that the seconds on the 505S is displayed as a disc. If you have seen an example of this, please comment below.

Additional Resources:

• Ronda 505 tech sheets and drawings (pdf)