Jacob & Co
Jacob & Co Epic X Chronograph Titanium and Black Ceramic EC400-21-AB-AB-A
The Jacob & Co Epic X Chronograph Titanium and Black Ceramic (reference EC400-21-AB-AB-A) is a 44 mm titanium watch with a black dial.
Specifications
Case
- Reference
- EC400-21-AB-AB-A
- Collection
- Epic X
- Case size
- 44 mm
- Case material
- Titanium
Dial and bezel
- Dial
- Black
Dial versions
This reference was made with these dials and finishes.
EC400-21-AB-AB-A Black
Black
How it compares within the Epic X family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| EC400-21-AB-AB-A (This watch) | 44 mm | Titanium | Black | — | — |
| EC323-21-AA-AA-A | 47 mm | Titanium | Green | — | — |
| EC430-20-AB-AA-A | 44 mm | Titanium | Blue | — | — |
| EC430-21-AB-AA-A | 44 mm | Titanium | Orange | — | — |
| EC440-22-AB-AA-A-BRUA | 43 mm | Titanium | — | — | — |
| EX115-95-AI-AA-AB-RUA | 44 mm | Ceramic | — | — | — |
| EX115.95.AD.AA.A | 44 mm | Ceramic | — | — | — |
| EX115.95.AF.AA.AB | 44 mm | Ceramic | — | — | — |
| EX120-43-AC-AC-A | 44 mm | Gold | Green | — | — |
About the Epic X family
Epic X was launched in 2015 and was the collection that made Jacob & Co. a full watchmaking brand. It is a sporty, skeletonised watch with an X-shaped motif in the movement, a large case and often a rubber strap, and the line was later revised with chronometer-certified versions.
The catalog lists many references, including Epic X Chrono models, in steel, ceramic, gold and gold with ceramic. The open movement makes condition easy to judge, so check for dust or marks, and confirm the reference against the case material and strap.
Quick answers
- What size is the Jacob & Co Epic X Chronograph Titanium and Black Ceramic EC400-21-AB-AB-A?
- The Jacob & Co Epic X Chronograph Titanium and Black Ceramic EC400-21-AB-AB-A has a 44 mm case.
- What is the Jacob & Co Epic X Chronograph Titanium and Black Ceramic EC400-21-AB-AB-A made of?
- The case is titanium.
Catalog facts checked October 2026.