Tudor
Tudor Black Bay 31 79603
The Tudor Black Bay 31 (reference 79603) is a 31 mm stainless Steel / Yellow Gold (S&G) watch.
Specifications
Case
- Reference
- 79603
- Collection
- Black Bay
- Case size
- 31 mm
- Case material
- Stainless Steel / Yellow Gold (S&G)
- Case shape
- Round
- Bracelet / strap
- Steel and yellow gold bracelet
Movement
- Movement
- Automatic
Dial versions
This reference was made with these dials and finishes.
79603 Anthracite
M79603-0003
Gem-set indexes · Diamond; Dial (gem-set indexes)
79603 Black
M79603-0001
Black
79603 Black Gem-set indexes
M79603-0006
Gem-set indexes · Diamond; Dial (gem-set indexes)
79603 Champagne Gem-set indexes #0004
M79603-0004
Gem-set indexes · Diamond; Dial (gem-set indexes)
79603 Champagne
M79603-0005
Champagne
79603 Champagne Gem-set indexes #0008
M79603-0008
Gem-set indexes · Diamond; Dial (gem-set indexes)
79603 Silver
M79603-0002
Silver
79603 Silver Gem-set indexes
M79603-0007
Gem-set indexes · Diamond; Dial (gem-set indexes)
How it compares within the Black Bay family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 79603 (This watch) | 31 mm | Stainless Steel / Yellow Gold (S&G) | — | — | — |
| 79310N | 39 mm | Steel | Yellow | MT5813 | 2025– |
| 7939G1A0NRU | 39 mm | Stainless Steel | Black | MT5450-U | 2024– |
| 7941A1A0NU | 41 mm | Stainless Steel | Black | MT5602-U | 2023– |
| 79600 | 31 mm | Stainless Steel | — | MT5201 | 2023– |
| 79640 | 36 mm | Stainless Steel | — | MT5400 | 2023– |
| 79660 | 39 mm | Stainless Steel | — | MT5602 | 2023– |
| 79680 | 41 mm | Stainless Steel | — | MT5601 | 2023– |
| 79833MN | 41 mm | Steel | Black | MT5652 | 2022– |
About the Black Bay family
The Black Bay was introduced in 2012 as the Heritage Black Bay, a dive watch drawing on Tudor's 1950s Submariners with a domed crystal, a large crown without guards and snowflake hands. It quickly grew into Tudor's main family.
The first models used an ETA caliber; from 2016 the Black Bay moved to the in-house MT5602 and related calibers. The family includes the 39 mm Black Bay Fifty-Eight of 2018, the GMT, the Chrono, Bronze versions, the Pro, the smaller Black Bay 54 and Master Chronometer models from 2023. Dealers note the size, bezel colour, caliber generation and bracelet or strap, since many versions share the same look.
Quick answers
- What size is the Tudor Black Bay 31 79603?
- The Tudor Black Bay 31 79603 has a 31 mm case.
- What is the Tudor Black Bay 31 79603 made of?
- The case is stainless Steel / Yellow Gold (S&G). Bracelet or strap: Steel and yellow gold bracelet.
- Which dials was the Tudor Black Bay 31 79603 made with?
- The catalog lists 4 dials: Anthracite, Black, Champagne, Silver.
Catalog facts checked October 2026.