Lorsa HS 237B Watch Spare Parts: Comprehensive Guide for Collectors and Watchmakers
The Lorsa HS 237B is a highly regarded vintage Swiss manual wind watch movement, known for its reliable construction and precision. It is a variant of the Lorsa 237 and measures 10½ lignes (23.3 mm diameter) with a slim height of 4.0 mm. This calibre features 15 jewels and operates at 18,000 vibrations per hour (vph). It uses a monometallic two-leg screw balance and a traditional Swiss pallet lever escapement, with a yoke winding system facilitating smooth power delivery. Some models also include a simple pointer calendar mechanism, making it a versatile and sought-after movement by collectors and watchmakers alike.
Key Technical Specifications
Calibre: Lorsa HS 237B
Diameter: 10½ lignes (23.3 mm)
Height: 4.0 mm
Jewels: 15
Frequency: 18,000 vph
Balance: Monometallic screw balance (two legs), no shock protection
Escapement: Swiss pallet lever
Winding mechanism: Yoke winding system
Features: Hours, minutes, small seconds, pointer date calendar
Common Spare Parts
Balance assembly and balance staff for stable oscillations and accuracy
Mainspring and barrel to maintain consistent power supply
Stem and crown for reliable winding and time adjustment
Yoke and winding lever as part of the winding and setting mechanism
Date wheel, jumper, and associated components for calendar function
Gear train wheels to ensure smooth transmission of power
Jewels and bearings to minimize friction and wear
Hands: period-appropriate hour, minute, seconds, and date pointers
Maintenance and Sourcing Tips
Verify the HS 237B marking for proper part identification
Source New Old Stock (NOS) or original Swiss parts from reputable suppliers
Utilize experienced watchmakers knowledgeable in vintage manual wind and calendar movements
Importance of Genuine Spare Parts
Ensures reliable accuracy and calendar operation
Preserves historical authenticity and collector value
Supports professional, durable restoration and sustained performance
Employing genuine Lorsa HS 237B spare parts plays a crucial role in maintaining the integrity and performance of these classic vintage timepieces, highly prized by enthusiasts worldwide.
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
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