TUDOR · Black Bay Pro and Black Bay GMT
TUDOR M79470-0001 vs TUDOR M79830RB-0001
5 published specifications differ between these two, and 9 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | TUDOR Black Bay GMT 41mm, burgundy and blue bezelM79830RB-0001 | |
|---|---|---|
| Case | 39mm steel case with polished and satin finish | 41mm steel case with polished and satin finish |
| Diameter | 39 mm | 41 mm |
| Bezel | 24-hour graduated fixed bezel in satin-brushed steel | Bidirectional rotatable 48-notch bezel in steel with a 24-hour graduated anodised aluminium disc in matt burgundy and blue |
| Crown | Screw-down winding crown in steel with the TUDOR rose in relief | Steel screw-down winding crown with the TUDOR rose in relief, with circular satin-brushed steel winding crown tube |
| Clasp | TUDOR T-fit clasp with rapid adjustment | Folding clasp with safety catch |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Water resistance
- Waterproof to 200m (660 ft)
- Crystal
- Domed sapphire crystal
- Dial
- Black, domed
- Bracelet
- Riveted steel bracelet with polished and satin finish
- Calibre
- Manufacture Calibre MT5652
- Movement
- Self-winding mechanical movement with bidirectional rotor system, built-in architecture
- Power reserve
- Approximately 70 hours
- Certification
- COSC
- Movement notes
- TUDOR states a five-year transferable guarantee with no registration or periodic maintenance checks required.
What the differences cost you
Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.
These reach different buyers
41 mm on the M79830RB-0001 against 39 mm on the M79470-0001. Diameter is a poor predictor of how a watch actually sits, but it is the field buyers filter on, so the two land in front of different people. Do not let one listing's photographs or copy stand in for the other.
What to check on each
M79470-0001
- Do not try to turn the bezel. TUDOR specifies it as fixed, so an immovable bezel is correct and forcing it is how a good example gets damaged.
- Confirm the 24-hour bezel is satin-brushed steel with no rotating insert, which distinguishes this reference from the GMT models in the same family.
- Run the T-fit rapid adjustment through its positions and confirm each one locks under a firm pull.
M79830RB-0001
- Grade the bezel disc as anodised aluminium. It fades and dents rather than chipping, so a paler burgundy on a used example is ageing rather than damage.
- Count the bezel through a full revolution against the specified 48 notches and confirm it turns freely both ways, which is correct for a timezone bezel.
- Check the crown tube is the circular satin-brushed steel type specified, since TUDOR calls the tube out separately on this reference.
Sources
- TUDOR official product page for reference M79470-0001 (Black Bay Pro; 39mm steel; fixed 24-hour bezel) - Case: 39mm steel case with polished and satin finish; Waterproofness: Waterproof to 200m (660 ft); Bezel: 24-hour graduated fixed bezel in satin-brushed steel; Dial: Black, domed; Crystal: Domed sapphire crystal; Movement: Manufacture Calibre MT5652 (COSC); self-winding mechanical movement with bidirectional rotor system; built-in architecture; Power Reserve: Power reserve of approximately 70 hours; Winding Crown: Screw-down winding crown in steel with the TUDOR rose in relief; Bracelet: Riveted steel bracelet with polished and satin finish, and TUDOR T-fit clasp with rapid adjustment; Guarantee: Five-year transferable guarantee with no registration or periodic maintenance checks required — retrieved 2026-09-23
- TUDOR official product page for reference M79830RB-0001 (Black Bay GMT; 41mm steel; burgundy and blue bezel) - Case: 41mm steel case with polished and satin finish; Waterproofness: Waterproof to 200m (660 ft); Bezel: Bidirectional rotatable 48 notches bezel in steel with 24-hour graduated anodised aluminium disc in matt burgundy and blue; Dial: Black, domed; Crystal: Domed sapphire crystal; Movement: Manufacture Calibre MT5652 (COSC); self-winding mechanical movement with bidirectional rotor system; built-in architecture; Power Reserve: Power reserve of approximately 70 hours; Winding Crown: Steel screw-down winding crown, with the TUDOR rose in relief, with circular satin-brushed steel winding crown tube; Bracelet: Riveted steel bracelet with polished and satin finish with folding clasp and safety catch; Guarantee: Five-year transferable guarantee with no registration or periodic maintenance checks required — retrieved 2026-09-23
Not affiliated with TUDOR. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.