Ronda Caliber 1037

Manufacturer	Ronda
Caliber Number	1037
Movement Type	Mechanical, manual-wind
Lignes	10.5”’
Diameter	23.3mm
Height	4.8mm
Jewel Count	17
Beat Rate / Frequency	18,000 bph / 2.5 Hz
Lift Angle	Unconfirmed
Power Reserve	~40 hours
Anti-Shock Device	Incabloc
Hand Count	3
Functions	Central hours; central minutes; central sweeping seconds; day/date at 3:00 or 6:00
Country of Manufacture	Switzerland, Swiss made
Known Models	Sicura (Add your watch to the comments below…)

The Ronda caliber 1037 is a vintage handwound watch movement produced in circa 1960s ~ 1970s.

1037 VS 1037-21:

There is a similar Ronda caliber 1037-21 with the main difference being that the “21” indicates a beat rate of 21,600 vph, compared to 18,000 vph on the 1037.

RAX VS RL:

You may see “RAX” under the balance wheel. This denotes the movement having a Swiss pallet lever system. Watches with “RL” have pin lever systems. If you are looking for spare parts, you will want to order accordingly.

Additional Resources:

• Ronda history on Wikipedia
• More vintage watch movements