Blancpain
Blancpain Fifty Fathoms Bathyscaphe 38 5100B-1110-NAOA
The Blancpain Fifty Fathoms Bathyscaphe 38 (reference 5100B-1110-NAOA) is a 38 mm stainless steel watch with a blue dial. It runs on the automatic caliber 1150 with a 100-hour power reserve and is water resistant to 300 m.
Specifications
Case
- Reference
- 5100B-1110-NAOA
- Collection
- Fifty Fathoms Bathyscaphe
- Case size
- 38 mm
- Thickness
- 10.77 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 300 m
- Bracelet / strap
- NATO strap
Dial and bezel
- Dial
- Blue
- Bezel
- Unidirectional rotating dive bezel
Movement
- Movement
- Automatic
- Caliber
- 1150
- Power reserve
- 100 hours
- Functions
- Date, Dive bezel
How it compares within the Fifty Fathoms Bathyscaphe family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 5100B-1110-NAOA (This watch) | 38 mm | Stainless steel | Blue | 1150 | — |
| 5000-0130-B52A | 43.6 mm | Ceramic | Black | 1315 | 2015– |
| 5000-1110-70B | 43 mm | Stainless steel | Grey | 1315 | — |
| 5000-1110-B52A | 43 mm | Stainless steel | Grey | 1315 | 2013– |
| 5071-1110-B52A | 43 mm | Stainless steel | Grey | 6054.P | 2018– |
| 5100-1130-B52A | 38 mm | Stainless steel | Black | 1153 | 2019– |
| 5100B-1110-B52A | 38 mm | Stainless steel | Grey | 1150 | — |
| 5100B-1110-NABA | 38 mm | Stainless steel | Grey | 1150 | — |
| 5200-1110-B52A | 43 mm | Stainless steel | Grey | F385 | 2015– |
About the Fifty Fathoms Bathyscaphe family
The Bathyscaphe name comes from a 1950s civilian version of the Fifty Fathoms. The modern line was introduced in 2013 as a cleaner, more understated sibling to the main Fifty Fathoms, with a 43 mm case in steel, titanium or ceramic, a ceramic bezel insert and a sober dial with applied markers.
The core time-and-date reference 5000 uses the caliber 1315 with five days of power reserve, while the 5200 is a flyback chronograph and smaller and complete calendar models complete the range. Gold versions in Sedna gold and grey ceramic examples also appear. For dealers, the Bathyscaphe offers the Fifty Fathoms name in a more wearable form, and the ceramic cases should be checked for chips at the edges.
Quick answers
- What size is the Blancpain Fifty Fathoms Bathyscaphe 38 5100B-1110-NAOA?
- The Blancpain Fifty Fathoms Bathyscaphe 38 5100B-1110-NAOA has a 38 mm case, 10.77 mm thick.
- What movement does the Blancpain Fifty Fathoms Bathyscaphe 38 5100B-1110-NAOA use?
- It uses the automatic caliber 1150, with a 100-hour power reserve.
- How water resistant is the Blancpain Fifty Fathoms Bathyscaphe 38 5100B-1110-NAOA?
- It is water resistant to 300 metres.
- What is the Blancpain Fifty Fathoms Bathyscaphe 38 5100B-1110-NAOA made of?
- The case is stainless steel. Bracelet or strap: NATO strap.
Catalog facts checked September 2026.