BFG – Baumgartner 911-31 (CLD) Watch Spare Parts: Detailed Overview
The Baumgartner BFG 911-31 (CLD) is a Swiss-made manual winding mechanical movement designed primarily for ladies’ watches, featuring a pin lever escapement and calendar date complication (CLD version). It is noted for its compact size, reliable performance, and complex, somewhat unusual gear train and calendar system.
Key Specifications
Calibre: BFG 911-31 (CLD)
Size: 8 1/2 lignes (approx. 19.2 mm diameter)
Beat Rate: 21,600 vibrations per hour (vph)
Jewels: Versions available with 1, 5, or 17 jewels
Escapement: Pin lever
Balance: Nickel anular balance, some variants with KIF shock protection
Winding: Yoke winding system
Functions: Sweep seconds and calendar date with semi-fast date switch and date correction
Complex Features: The date mechanism has a semi-fast switching capability due to special teeth lengths and jumpers, allowing date correction at specific times.
Common Spare Parts
Mainspring and Barrel: Original and New Old Stock (NOS) mainsprings supplying reliable power.
Balance Assembly: Balance wheel, staff, hairspring, and regulator ensuring precision and durability.
Escape Wheel and Pallet Fork: Essential escapement components requiring precision fitting.
Gear Train Wheels: Including driving wheel, third wheel, and second wheels transmitting power effectively.
Calendar Mechanism: Date wheels, jumpers, locking levers, springs, and gears enabling semi-fast date correction.
Winding and Setting Components: Stems, crowns, yokes, setting levers, and related springs.
Hands and Dial Components: Period-accurate replacements preserving vintage aesthetics.
Screws, Plates, and Bridges: Structural and assembly components for movement integrity.
Maintenance and Sourcing Tips
Always verify the BFG 911-31 (CLD) marking before ordering parts to ensure compatibility.
Use NOS or donor parts for rare components to maintain original functionality.
Handle calendar mechanism with care during servicing to avoid damage.
Lubricate sparingly with oils appropriate for vintage pin lever movements.
Specialist dealers and vintage parts suppliers provide extensive Baumgartner 911 series parts.
Importance of Genuine Spare Parts
Authentic components guarantee accuracy, reliability, and extended service life.
Preserve the collector’s value and vintage authenticity.
Support professional servicing and long-term movement function.
Maintaining your Baumgartner BFG 911-31 (CLD) with genuine spare parts enhances performance and honors its place in Swiss watchmaking heritage.
You can confirm the order by making a PayPal payment. My account email address is [email protected]
Watch Parts Enquiry
* If you are unable to fill out any of the required information fields, please type “N/A”.
Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
Mobile/WhatsApp: +91- 9841 360 340