What a Black Bay GMT 79830RB Sells for in Bangkok — October 2026
Tudor Black Bay GMT launched at Baselworld 2018 with the Pepsi bezel (red-blue) using MT5652 in-house caliber — Tudor's first in-house GMT movement.
Comparing it with the rest of the family? See Tudor Black Bay prices for every reference.
Estimated price bands as of October 2026. They are the WatchCharts market price for the 79830RB (US$3,131 on 13 October 2026) and its US$2,758–3,504 market range, cross-checked against WatchScanning's guide (about US$3,400) and Asian dealer asking prices (Japan, Taiwan and Hong Kong medians of about US$3,000–3,600), converted at ฿32.5/USD. They are US and international market figures, not Bangkok transaction records:
- Low ฿90,000 — 2019–2020 references, worn, no box
- Median ฿100,000 — Full-set 2022–2023 with TH warranty
- High ฿115,000 — NOS 2024+ with stickers
Black Bay GMT vs Rolex GMT-Master II
The most-asked question for Tudor GMT in Thailand:
| Feature | Tudor BB GMT 79830RB | Rolex GMT-Master II 126710BLRO |
|---|---|---|
| Size | 41mm | 40mm |
| Thickness | 14.6mm | 11.9mm |
| Water resistance | 200m | 100m |
| Caliber | MT5652 (70h) | 3285 (70h) |
| Material | 316L steel | 904L Oystersteel |
| Bezel | Aluminium insert | Cerachrom |
| Crown adjustment | True GMT (independent hour) | True GMT (independent hour) |
| Retail | US$5,275 US retail (WatchCharts) | Not re-checked in this update |
| Used median | ฿100,000 | ฿660,000 |
Tudor GMT is the option for Pepsi GMT buyers on budget. Used Tudor trades at roughly one-seventh the Rolex GMT-Master II Pepsi price (our 126710 page puts the Pepsi at a ฿660,000 median).
Seller Pattern — Why Black Bay GMTs Come to Market
The usual reasons a Black Bay GMT comes up for sale:
- Selling to upgrade to Rolex GMT-Master II 126710BLRO
- The 14.6mm thickness becomes uncomfortable long-term
- Tudor duplicates — sellers with multiple Tudors offloading the one worn least
- Needing cash
What Bangkok Dealers Pay
| Scenario | Seller payout (2023 full set) |
|---|---|
| Full-set, TH warranty | ฿78,000–฿82,000 |
| Full-set, overseas warranty | ฿73,000–฿77,000 |
| No box, papers | ฿65,000–฿71,000 |
| Loose | ฿58,000–฿65,000 |
Dealers pay 78–82% — similar to Pelagos and BB58.
79830RB Authenticity Checkpoints
- MT5652 caliber — in-house with COSC certification and silicon hairspring
- Pepsi bezel — aluminium insert (not ceramic); Tudor deliberately uses aluminium for heritage feel. Bezel has matte finish distinct from Rolex GMT-Master II
- Snowflake hands — Tudor signature
- Riveted bracelet — same as BB58 but wider (41mm case)
- True GMT mechanism — hour hand jumps one hour at a time (true GMT). Many fakes use "office GMT" where the GMT hand is adjusted instead
Bangkok Buyer Quotes
The reasons buyers commonly give for choosing the Black Bay GMT:
- They want a Pepsi GMT and a Rolex is out of budget
- They travel often and want a true GMT at a moderate price
- An in-house, COSC-certified caliber without stepping up to Rolex
Price Movement 2022–2026
The 2022–2026 medians this page used to list had no source behind them, so they have been removed. The dated points we can source, converted at ฿32.5/USD:
- August 2026 — WatchCharts UK market price £2,349 against £4,120 UK retail
- 16 August 2026 — WatchScanning pre-owned Black Bay GMT about US$3,400 (about ฿110,500)
- 13 October 2026 — WatchCharts market price US$3,131 (about ฿101,800), against US$5,275 US retail
Get a LINE quote for your Black Bay GMT →
Data sources: