Louis Erard
Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089
The Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm (reference 85237AA89.BGA089) is a 42 mm stainless steel watch with a black dial. It runs on the automatic caliber Sellita SW266-1 with a 38-hour power reserve and is water resistant to 50 m.
Specifications
Case
- Reference
- 85237AA89.BGA089
- Collection
- Excellence
- Case size
- 42 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 50 m
- Bracelet / strap
- Black toad leather
Dial and bezel
- Dial
- Black
Movement
- Movement
- Automatic
- Caliber
- Sellita SW266-1
- Power reserve
- 38 hours
- Frequency
- 28,800 vph
- Jewels
- 31
- Functions
- Regulator
Production
- Production
- Limited
Dial versions
This reference was made with these dials and finishes.
85237AA89.BGA089 Black
Matt black hour circle; red seconds flange
How it compares within the Excellence family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 85237AA89.BGA089 (This watch) | 42 mm | Stainless steel | Black | Sellita SW266-1 | — |
| 22243AA01.BOA02 | 38 mm | Stainless steel | Silver | 2 x Sellita SW100 | — |
| 34237AA54.BVA38 | 42 mm | Stainless steel | Cream | Sellita SW261-1 | — |
| 54230AS61.BVA08 | 40 mm | Stainless steel | Silver | ETA 7001 with RE9 regulator module | — |
| 54230NS62.BVA09 | 40 mm | Stainless steel with black PVD | Black | ETA 7001 with RE9 regulator module | — |
| 66237AA52.BVA34 | 42 mm | Stainless steel | Black | Sellita SW261-1 | — |
| 74359TT02.BTT88 | 40 mm | Microblasted grade 2 titanium and polished grade 5 titanium; red ABS pusher | Black | Sellita SW500 MPCa | — |
| 75357TT02.BTT88 | 40 mm | Microblasted grade 2 titanium and polished grade 5 titanium | Black | ETA 2836-2 | — |
| 85237AA56.BVA175 | 42 mm | Stainless steel | Grey | Sellita SW266-1 | — |
About the Excellence family
The Excellence is Louis Erard's upper line, used for its enamel and guilloché dials and its collaborations with designers and independent watchmakers.
The catalog lists the Excellence Émail Grand Feu and Guilloché Main, the Regulator and La Semaine made with Alain Silberstein, Le Chronographe and other editions, in steel and titanium. Most are limited, so dealers check the number and papers.
Quick answers
- What size is the Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089?
- The Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089 has a 42 mm case.
- What movement does the Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089 use?
- It uses the automatic caliber Sellita SW266-1, with a 38-hour power reserve.
- How water resistant is the Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089?
- It is water resistant to 50 metres.
- Is the Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089 still in production?
- Limited.
- What is the Louis Erard Le Régulateur x Konstantin Chaykin Dusk to Dawn 42mm 85237AA89.BGA089 made of?
- The case is stainless steel. Bracelet or strap: Black toad leather.
Catalog facts checked November 2026.