No products in the cart.
Return To ShopWatch Database
Ronda 1236-21
Ligne: 12.5'''
Jewels: 17/25/30
Power Reserve: 42 hrs
Frequency: 18000 vph
Type: Automatic
Period used: 1957-1962
Diameter: 28.5 mm
Height: 4.8 mm
Hands: 1.50 x 0.90 x 0.22 mm
The Ronda 1236-21 watch movement, produced from 1957 to 1962, belongs to the first movement family to incorporate a micro rotor for self-winding. Its self-winding gear incorporates a pinion that switches direction and is positioned between two large jewels. In 17-jewel variants, one of these jewels is replaced by a polished steel disc. Early samples of the Ronda 1236-21 bear the 1001A signature of their predecessor. This movement offers automatic winding, a sweep second hand, and a date function that can be set by changing the time between 23:30 and 24:00 hours.
The Ronda 1236-21 features the following functions:
- Automatic Winding
- Date: Set by changing 23:30-24:00h
- Sweep second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.00 x 0.095 x 340 x 9.5 mm | GR2436X | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
All watch database content © EmmyWatch LLC. Unauthorized redistribution of content is strictly prohibited. All rights are reserved.
