Specifications
- Reference
- BR0394-A521/SRB
- Family
- BR 03
- Category
- Chronograph
- Status
- Current
- Case material
- Stainless steel
- Case diameter
- 42 mm
- Case thickness
- 12.5 mm Third-party
- Lug-to-lug
- 51.5 mm Third-party
- Lug width
- —
- Water resistance
- 100 m
- Bezel
- —
- Calibre
- BR-CAL.301 Official
- Power reserve
- 42 h
Official product page · retrieved October 20, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
At the limit
Lug-to-lug 51.5 mm on a flat top of 54.1 mm: 96 % of the width.
Lug-to-lug is 95 to 100% of the flat top. The lugs reach the edge, so check your wrist shape.
Measurements and sources
Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.
Case thickness
| Value | Type | Source | Date |
|---|---|---|---|
| 12.5 mm | Third-party | The 1916 Company Bell & Ross publishes no thickness for this case; the review that gives the lug-to-lug reads "measures 12.5mm in thickness and 51.5mm from lug-to-lug". | October 25, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 51.5 mm | Third-party | The 1916 Company Review titled "Bell & Ross BR 03 94 Horolum Chronograph (BR0394-GR-ST/SCA) Review": "measures 12.5mm in thickness and 51.5mm from lug-to-lug". | October 25, 2026 |
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
No source gave this figure yet.
Calibre source
Official Bell & Ross · retrieved October 20, 2026
Other versions in the same case
These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.
- BR0394-BL-SI/SCA · Steel, leather strap
- BR0394-BLC-ST/SCA · BR-03 Chrono Black Steel, leather strap
- BR0394-BLU-ST/SCA · BR-03 Chrono Blue Steel, leather strap
- BR0394-GR-ST/SCA · Horolum, leather strap
- BR0394-O-CA · Carbon Orange, fabric strap
- BR0394-RS19/SRB · R.S.19, rubber strap
Other BR 03 references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| BR-03 Type A Patrouille de France 42 mm BR03AD-BBR-ST/SRB | 42 mm | 11.25 mm | — | BR-CAL.103 |
| BR-03 42 mm BR0392-A522-CE/SRB | 42 mm | 10.4 mm | 51.5 mm | BR-CAL.302 |
| BR-03 41 mm (steel) BR03A-GB-ST/SCA | 41 mm | 9.65 mm | — | BR-CAL.302-1 |
| BR-03 Skeleton Steel 41 mm BR03A-BL-SKST/SRB | 41 mm | 9.65 mm | — | BR-CAL.328 |
| BR-03 41 mm (ceramic, calibre BR-CAL.302-1) BR03A-PH-CE/SRB | 41 mm | 10.6 mm | — | BR-CAL.302-1 |
| BR-03 41 mm (ceramic, calibre BR-CAL.327) BR03A-HE-CE/SRB | 41 mm | 10.6 mm | — | BR-CAL.327 |
| BR-03 Astro 41 mm BR03A-EMM-CE/SRB | 41 mm | 11.5 mm | — | BR-CAL.327 |
| BR-03 Skeleton Black Ceramic 41 mm BR03A-BL-SKCE/SRB | 41 mm | 10.6 mm | — | BR-CAL.328 |
| BR-03 Skeleton Lum Ceramic 41 mm BR03A-LM-SKCE/SRB | 41 mm | 11.25 mm | — | BR-CAL.328 |
| BR-03 Space Mission 41 mm BR03A-SPM-CE/SRB | 41 mm | 10.6 mm | — | BR-CAL.325 |
| BR-03 White Steel and Gold 41 mm BR03A-WH-STPG/SCA | 41 mm | 9.4 mm | — | BR-CAL.302-1 |
| BR 03-93 42 mm BR0393-GMT-ST/SCA | 42 mm | 11.3 mm | — | BR-CAL.303 |
| BR-03 42 mm (steel, 12.05 mm high) BR0392-D-BL-ST/SRB | 42 mm | 12.05 mm | — | BR-CAL.302 |
| BR 03-92 42 mm BR0392-D-BL-BR/SCA | 42 mm | 12.05 mm | — | BR-CAL.302 |
| BR-03 42 mm (ceramic, thickness not given) BR0392-D-TR-CE/SRB | 42 mm | 13.6 mm | 51.5 mm | BR-CAL.302 |
| BR-03 Diver 42 mm BR03A-D-OL-CE/SRB | 42 mm | 13.35 mm | — | BR-CAL.302-1 |
| BR-03 Diver Black Bronze 42 mm BR03A-D-BL-BR/SRB | 42 mm | 12.3 mm | — | BR-CAL.302-1 |
Other Bell & Ross models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| BR-05 42 mm BR05C-A523-ST/SCA | 42 mm | 14.25 mm | — | BR-CAL.326 |
| BR-05 Chrono 42 mm BR05C-STD-STPG/SCA | 42 mm | 14.25 mm | — | BR-CAL.326 |
| BR V2-94 41 mm BRV294-RS18/SCA | 41 mm | 13.9 mm | 47.8 mm | BR-CAL.301 |
| BR V2-92 41 mm BRV292-O-ST/SST | 41 mm | 11.5 mm | — | BR-CAL.302 |
| BR-X3 41 mm BRX3R-BLU-ST/SRB | 41 mm | 13.3 mm | — | BR-CAL.323 |
| BR-X5 41 mm BRX5R-MTR-ST/SRB | 41 mm | 12.8 mm | — | BR-CAL.323 |
Show 15 more
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| BR-05 Black Ceramic 41 mm BR05A-BL-CE/SRB | 41 mm | 11.2 mm | — | BR-CAL.321-1 |
| BR-05 Skeleton Ceramic 41 mm BR05A-BL-SK-CE/SCE | 41 mm | 11.2 mm | — | BR-CAL.322-1 |
| BR-X5 Black Titanium 41 mm BRX5R-BL-TI/STI | 41 mm | 12.8 mm | — | BR-CAL.323 |
| BR-05 40 mm BR05A-DR-ST/SST | 40 mm | 10.33 mm | — | BR-CAL.321 |
| BR-05 Artline 40 mm BR05A-BL-GLST/SST | 40 mm | 10.5 mm | — | BR-CAL.321 |
| BR-05 Grey Mirror Steel 40 mm BR05A-MI-ST/SRB | 40 mm | 10.5 mm | — | BR-CAL.321-1 |
| BR-05 Skeleton 40 mm BR05A-GN-SKST/SRB | 40 mm | 10.33 mm | — | BR-CAL.322 |
| BR-05 Skeleton Arctic Blue 40 mm BR05A-AB-SKST/SST | 40 mm | 10.33 mm | — | BR-CAL.322-1 |
| BR-X3 Micro-Rotor 40 mm BRX3M-MR-ST/SCA | 40 mm | 9 mm | — | BR-CAL.390 |
| BR-X3 Tourbillon MICRO-ROTOR 40 mm BRX3M-TRB-ST/SCR | 40 mm | 9 mm | — | BR-CAL.389 |
| BR-05 Green Gold 40 mm BR05A-GN-PG/SCR | 40 mm | 10.33 mm | — | BR-CAL.321 |
| BR V1-92 38.5 mm BRV192-MIL-ST/SCA | 38.5 mm | 11 mm | 45.9 mm | BR-CAL.302 |
| BR V2-93 41 mm BRV293-BL-ST/SRB | 41 mm | 12.3 mm | 47.7 mm | BR-CAL.303 |
| BR-05 GMT Green Steel 41 mm BR05G-GN-ST/SRB | 41 mm | 11 mm | — | BR-CAL.325-1 |
| BR-05 Steel 36 mm BR05A-S-GR-ST/SST | 36 mm | 8.5 mm | — | BR-CAL.329 |