Rolex
Rolex GMT-Master — Ref. 1675
Rolex GMT-Master — Ref. 1675
Complete Guide & Authentication Service
The Rolex GMT-Master 1675 (1959–1980) is one of the longest-running and most iconic references in Rolex history. Famous for its red/blue “Pepsi” bezel and robust Oyster case, the 1675 was the essential tool watch for pilots of the Jet Age. Below you’ll find a deep guide with authentication checklist, serial ranges, dial/insert/bracelet variants, military issues, and common red flags — plus an easy 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
Launched in 1959, the 1675 replaced the earlier reference 6542 and introduced crown guards, a larger 40 mm case, and improved durability. Over its 20-year run, it went through numerous dial generations (gilt gloss, matte “long E,” radial plots), bezel variations (faded Pepsi, all-black), and bracelet configurations (rivet, folded, solid Oyster, Jubilee). Authenticating a 1675 requires cross-checking case engravings, dial typography, insert fonts, handsets, and bracelet codes.
40 mm Oyster
Stainless steel case with pointed → rounded crown guards; plexiglass crystal.
Cal. 1565 / 1575
GMT complication, hacking seconds (after ~1971); bridges/finishing must align.
Pepsi Bezel
Aluminum red/blue insert; aging varies (ghost, fuchsia, navy); originality crucial.
Simple Process
Authenticate Your 1675 in 3 Steps
We combine AI flagging with expert review to deliver a fast, reliable preliminary certificate built for buyers, sellers and collectors.
1. Upload
Provide clear photos of dial, bezel, lugs/serial area, caseback inside/out, movement, bracelet/clasp.
2. Review
We check serial window, dial generation (gilt/matte/radial), bezel insert font/color, crown guard type, and bracelet codes.
3. Certificate
Receive a PDF with ID + QR for instant online verification — ideal for listings and negotiations.
Deep Dive
Authentication Checklist — GMT-Master 1675
A structured checklist minimizes risk. Use it before buying, selling, or listing your watch.
Case & Bezel
- 40 mm steel Oyster; pointed crown guards (1959–63) → rounded guards.
- Sharp lug bevels; avoid over-polished cases with softened chamfers.
- Caseback: inside reference “1675”; outside plain.
- Pepsi bezel insert: correct font, color tone, fading; fuchsia inserts highly collectible.
- Check pearl type, triangle shape, and font spacing for period correctness.
Movement
- Cal. 1565 (early, non-hacking) → Cal. 1575 (later, hacking seconds post-1971).
- Bridge engravings, rotor type, regulator style must align with era.
- Inspect screws, finish, and service marks inside caseback.
- Verify GMT hand function and 24h gearing; aftermarket parts common in swaps.
Dial & Hands
- Glossy gilt dials with chapter ring (1959–1966).
- Matte “Long E” dials (late 1960s–1970s); font spacing crucial.
- Radial plots (rare, 1970s) with smaller lume closer to center.
- “SWISS” or “SWISS – T < 25” signatures depending on era.
- Hands: Mercedes hour, pencil GMT; color/lume aging must match the dial.
Bracelet & Clasp
- Early rivet 7206 Oyster with 80 end links.
- Folded 7836/78360 Oyster or Jubilee optional (popular with GMT).
- Later solid 93150 Oyster possible (service replacement).
- Clasp codes date the bracelet; mismatched or over-stamped codes = red flag.
Pro Tip: Many GMT-Master 1675s feature service parts (hands, bezel inserts, bracelets). Acceptable if disclosed — our certificate flags them clearly.
Dating the Watch
Indicative Serial Windows (’60s–’70s)
Use these as guidance; overlap occurs and caseback/bracelet codes refine accuracy.
| Serial Range | Approx. Year | Notes |
|---|---|---|
| 500k – 999k | 1959–1963 | Early gilt dials; pointed crown guards |
| 1.0M – 1.4M | 1964–1966 | Glossy gilt; transition to rounded guards |
| 1.5M – 2.4M | 1967–1970 | Matte dials appear; “Long E” typography |
| 2.5M – 3.9M | 1971–1975 | Cal. 1575 with hacking; folded bracelets |
| 4.0M – 5.9M | 1976–1979 | Radial dials; fuchsia inserts seen |
Bracelet clasp codes and caseback stamps help refine production year further.
Risks
Common 1675 Red Flags
Redial / Reprint
Fonts too heavy or too fresh; misaligned coronet; lacquer doesn’t match case wear.
Incorrect Insert
Modern service Pepsi or aftermarket all-black not coherent with period.
Over-Polished Case
Bevels gone, crown guards thinned, serials re-engraved — major value hit.
Hands Mismatch
GMT hand wrong shape/length; lume mismatch; aftermarket replacement.
Movement Swap
Wrong caliber or bridge engravings; missing hacking when serial requires it.
Bracelet Incoherency
Incorrect end links, clasp code outside era; Jubilee/Oyster not disclosed.
Choose Your Speed
1675 Authentication Packages
All packages include unique Certificate ID + QR, email support, and annotated observations specific to your 1675.
Questions
Rolex GMT-Master 1675 — FAQ
Key answers before you buy, sell or list a 1675.
Can you authenticate from photos only?
Yes. Our preliminary certificate relies on provided images; movement photos improve reliability.
Do you check bezel inserts?
We analyze font thickness, color fading, triangle and pearl to ensure period correctness.
Are Jubilee bracelets correct?
Yes — many GMT-Master 1675s were sold with Jubilee; we verify codes and fit.
How fast is the turnaround?
Standard 24h; expedited 6h and 2h available when capacity allows.
Do you flag service parts?
Yes. Crystals, crowns, hands and bracelets are annotated so you can price accordingly.
Is the certificate trusted by buyers?
Our QR system provides instant verification online — boosting trust in listings and negotiations.
Ready to Verify Your GMT-Master 1675?
Attach a trusted, verifiable document to your negotiation. It pays for itself in time saved and stronger outcomes.