Rolex
Rolex GMT-Master — Ref. 1675
Rolex GMT-Master — Ref. 1675
Complete Guide & Authentication Service
The Rolex GMT-Master reference 1675 (1959–1980) is one of the most iconic vintage sports models. Known for its Pepsi red/blue bezel, gilt and matte dial variations, and distinctive small 24h hand, it is a cornerstone of Rolex collecting. Below you’ll find a long-form guide with authentication checklist, serial ranges, dial/bracelet variants and common red flags — plus a direct way to order your preliminary certificate with QR verification.
24h
Delivery
€39
Starting Price
QR
Verification
Independent
Service
Model Overview
Why the GMT-Master 1675 Matters
Introduced in 1959, the 1675 was the first GMT-Master to feature crown guards and remained in production for over 20 years. Early examples featured gilt dials, while later models transitioned to matte dials. Collectors value the Pepsi bezel, unique patina development, and the early “small arrow” 24h hand. Authenticating a 1675 requires careful analysis of dial type, bezel insert, case guards, bracelet codes, and serial ranges.
40 mm
Stainless steel case with pointed or rounded crown guards, plexiglass crystal.
Cal. 1565 / 1575
Automatic movement with GMT function, hacking introduced mid-1970s.
Pepsi Bezel
Red/blue aluminum insert fades uniquely, an authenticity and value marker.
Simple Process
Authenticate Your 1675 in 3 Steps
Our hybrid AI + expert system ensures your GMT-Master 1675 is verified quickly with a QR-backed certificate trusted by buyers worldwide.
1. Upload
Clear photos of dial, bezel, crown guards, movement (if possible), bracelet and serial area.
2. Review
We analyze gilt vs. matte dial, font consistency, bezel aging, bracelet/end-link codes.
3. Certificate
You’ll receive a PDF with Certificate ID + QR, instantly verifiable online.
Deep Dive
Authentication Checklist — GMT-Master 1675
A detailed checklist to minimize risk when buying or selling.
Case & Bezel
- 40 mm steel case, pointed or rounded crown guards.
- Aluminum Pepsi bezel insert, font and fade must match era.
- Caseback inside engraved with correct ref., outside plain.
- No rehaut engraving (added decades later).
Movement
- Cal. 1565 (early) non-hacking or Cal. 1575 (later) hacking.
- GMT hand should move in sync with hour hand, not independently (pre-quickset era).
- Check engravings “Montres Rolex SA” on bridges.
- Rotor wear patterns and plating must align with period.
Dial & Hands
- Early gilt gloss dials, later matte white print.
- “Swiss T < 25” tritium marking common in later pieces.
- Small arrow GMT hand on early production, later red GMT hand.
- Lume plots must age consistently with hands.
Bracelet & Clasp
- 7206 riveted Oyster (early) or 7836 folded link (later).
- Correct end links (58, 280, 580 depending on era).
- Clasp codes must align with case serial window.
- Stretch and replaced links reduce value.
Pro Tip: A naturally faded Pepsi bezel (pink/sky blue tones) increases desirability, but artificially faded inserts are common fakes — our analysis distinguishes them.
Dating the Watch
Indicative Serial Windows (’60s–’70s)
Serials overlap, use alongside bracelet/clasp codes for precise dating.
| Serial Range | Approx. Year | Notes |
|---|---|---|
| 500,000 – 1,000,000 | 1959–1963 | Gilt gloss dials, small arrow hand |
| 1.0M – 2.0M | 1964–1968 | Matte dial transition, red GMT hand |
| 2.1M – 3.0M | 1969–1972 | Matte dials, white printing |
| 3.1M – 4.3M | 1973–1978 | Later 1675, hacking movements |
Risks
Common 1675 Red Flags
Fake Pepsi Bezel
Incorrect font, overly bright modern colors, wrong fade pattern.
Redial
Wrong gilt/matte font, inconsistent minute track, luminous too fresh.
Over-Polished Case
Thinned lugs, lost chamfers, shallow serials.
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Wrong Bracelet
Incorrect end links or Jubilee swapped for Oyster without disclosure.
Movement Swap
Non-Rolex or wrong-era 1575; missing engravings.
Franken Watch
Mismatched dial, hands, bezel from different eras.
Choose Your Speed
1675 Authentication Packages
All packages include Certificate ID + QR, email support and detailed observations specific to your 1675.
Questions
Rolex GMT-Master 1675 — FAQ
Your most common questions, answered.
Can you authenticate gilt dials?
Yes, we analyze font style, coronet shape, chapter ring and lacquer consistency.
Do you check bracelet codes?
Yes, we cross-check rivet/folded links and clasp codes against serial ranges.
Will a service bezel hurt value?
Yes, originality is key — but service inserts are acceptable if disclosed.
How fast is delivery?
Standard 24h; 6h and 2h express when available.
Is your certificate trusted by buyers?
Our QR/ID lets anyone verify instantly online — ideal for transactions.
Do you cover other GMT references?
Yes, including 6542, 16750, 16710 and modern ceramic models.
Ready to Verify Your GMT-Master 1675?
Give buyers confidence with a verifiable certificate — a small investment that pays back in trust and better negotiations.