BFG – Baumgartner 158(CLD) Watch Spare Parts: Essential Guide

The Baumgartner (BFG) 158(CLD) is a mechanical, manual winding Swiss movement known for its pin lever escapement, sweep seconds, and date function. This robust and popular movement was featured in many affordable vintage watches of the mid-to-late 20th century.
Key Technical Specifications

Calibre: BFG 158(CLD)

Movement Type: Mechanical, manual winding

Diameter: 12.5 x 13.5 lignes (ca. 28–30.7mm)

Beat Rate: 18,000 vibrations per hour (vph)

Functions: Hour, minute, sweep seconds, date (calendar)

Escapement: Pin lever (Roskopf type)

Jewels: Usually 1 (sometimes more in variants)

Power Reserve: Approx. 44 hours

Stem Height: ~2.3mm

Shock Protection: Generally not included

Common Spare Parts and Part Numbers

Mainspring: 1.20 x 0.120/0.130 x 320/300 x 9.5mm (GR2973/GR2988)

Balance Assembly: 721/1634, 721/1635

Barrel & Train Bridge: A/4998

Barrel Arbor: 195/1137

Cannon Pinion: 245/902

Center Wheel (Offset): 203/91

Clutch Assembly: 435/804 (lever), 407/925 (wheel)

Combo Click & Spring: 434/96

Crown Wheel: 420/1087

Date Mechanism:

Drive wheel (A/5004),

Indicator (A/5005),

Roller/spring (A/5002, A/5003),

Intermediate wheel (A/5006)

Escape Wheel: 705/1130

Fourth Wheel: 224/575, 224/559

Hour Wheel: 255/624

Minute Wheel: 260/926

Pallet Fork & Arbor: 710/1126

Ratchet Wheel: 415/1079

Regulator: 301/1106

Roller: 82S/360R

Winding Pinion: 410/1137, 410/1363

Stem: Tap 10, 200/1584F

Set Lever & Spring: 443/1213, 440/858

Screws: Many specialized reference numbers per assembly

Maintenance and Sourcing Tips

Use NOS (New Old Stock) or quality donor movements; many parts are still available from specialist suppliers and even from old stock.

Pin lever escapements need very light oiling; over-lubrication can be detrimental.

Confirm the BFG 158(CLD) identification on your movement before ordering parts or attempting repairs.

Date and calendar mechanisms are delicate—handle with care during disassembly/reassembly.

Donor movements and part kits are commonly available due to the vast historical production.

Importance of Genuine Parts

Genuine parts ensure proper fit, durability, and authentic restoration, maintaining timekeeping and vintage value.

Keeping to factory specifications helps preserve the historical and collector worth of these iconic Swiss movements.

Maintaining your BFG 158(CLD) movement with authentic parts guarantees reliability and honors its place in affordable Swiss watch history.

 

You can confirm the order by making a PayPal payment. My account email address is [email protected]

Stem, Crown, Hands & Spares might be available for this movement.

Email us for rate and availability: [email protected]

Mobile/WhatsApp: +91- 9841 360 340