NOS Harley Ronda Cal. 938 Swiss Automatic New Time Watch Movement
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NOS Harley Ronda Cal. 938 – 17 Jewel Swiss Automatic Movement – Ronda‑Matic 938 – Approx. 20 mm
📌 Description
Genuine Harley Ronda Cal. 938 Swiss automatic movement, also known as the Ronda‑Matic 938. This is a New Old Stock (NOS) movement from long‑term watchmaker storage. The automatic rotor is marked “New Time”.
The movement appears to have a blank gold date wheel (see photos). Ideal for collectors, restorers, or watchmakers needing a vintage Swiss automatic caliber.
📏 Technical Specifications
- Brand: Harley Ronda
- Caliber: 938 (Ronda‑Matic 938)
- Jewels: 17 jewels
- Type: Automatic, Swiss made
- Diameter: Approximately 20 mm
- Ligne Size: 10½"’ (based on typical Ronda‑Matic sizing; not individually verified)
- Beat Rate: 18,000 A/h (based on Ronda 938 family references; may vary)
- Shock Protection: Incabloc (common on this series; not confirmed on this exact unit)
- Calendar: Date – blank gold date wheel installed
- Winding: Automatic + manual wind (typical for this caliber family)
- Escapement: Swiss lever (standard for Ronda‑Matic movements)
*Some specifications are based on known Ronda‑Matic 938 references and may vary by production batch. Please verify measurements and technical details before installation.*
🧭 Condition
- NOS – New Old Stock Swiss movement
- Unused, from long‑term watchmaker storage
- Blank gold date wheel installed
- May show light marks from storage
- Offered as a project or replacement movement
- A full service is recommended due to age
Everything included is shown in the photos.
🔍 Compatibility & Use — For Reference Only
The Ronda‑Matic 938 family was used in various Swiss private‑label automatic watches. Because case dimensions and dial feet vary widely, compatibility must be confirmed by checking:
- Movement diameter (approx. 20 mm)
- Dial feet position
- Stem height
- Calendar alignment
- Case ring / movement holder requirements
*Compatibility information is provided for reference only — no specific brand or model fit is guaranteed.*
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I have bought few watches from them and recommend them if you are looking to buy a watch. I as actually able to buy few watches from them that were not listed on their website. Apparently they have a lot of inventory that doesn’t even make it to the website. So if your are looking for vintage watches, you might want email them, if you can’t find it on the site.
Thank you for all the help Raymin.
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