Make: Rolex
Model: Datejust
Reference: 1603
Year: 1978
Movement: Automatic calibre
Box and papers: Box, service papers, Watch Register Certificate
Case: 36mm Oyster steel
Dial: Rare blue Sigma
Bracelet/Strap: Steel Jubilee bracelet
Condition: Very good vintage
Serviced: October 2025
Warranty: 6 month RHW warranty
The Blue Sigma Dial Classic
The Rolex Datejust Ref. 1603 represents the very best of 1970s Rolex craftsmanship — timeless, versatile, and unmistakably elegant. By the late 1970s, the Datejust had already cemented its reputation as the perfect everyday luxury watch, with its combination of precision timekeeping and enduring design. But this example takes that legacy to another level with a rare blue Sigma dial, a configuration seldom seen and highly sought after by collectors.
This particular watch is a full original example, presented on its Jubilee bracelet, and comes complete with an original Rolex box. It has just undergone a full service in October 2025, ensuring it performs perfectly while preserving its vintage authenticity.
Why You’ll Love It
• Rare Blue Dial: Deep, rich, and beautifully aged — the blue hue of this dial was one of the most striking (and least common) colour choices of the 1970s. Over the years, it has mellowed subtly, creating a unique character that no two examples share.
• Sigma Dial Significance: The ‘σ T SWISS T σ’ signature at the bottom of the dial denotes the use of solid gold indices and hands, a mark introduced by the Association Suisse pour l’Industrie Horlogère (ASIH) in the early 1970s to promote Swiss-made precious metal details. Rolex used this symbol discreetly, making these dials a fascinating and collectible piece of horological history.
• Original Condition: The components of this piece speaks to originality and care — the case edges remain well defined, the bracelet is good, and the dial is untouched.
• Fresh Service (October 2025): Professionally serviced by our accredited watchmaker and running to precise timekeeping standards.
• Complete with Original Rolex Box: An elegant finishing touch that enhances its collector appeal.
• At £4,750, this Datejust offers remarkable value for one of the most distinctive and historically significant 1603 configurations available.
Iconic Status
The Rolex Datejust has been the choice of leaders, artists, and icons for decades — worn by the likes of Martin Luther King Jr., Ronald Reagan, and Harrison Ford. But it’s examples like this one, with rare dial variations such as the blue Sigma, that stand apart in the collector world. They combine the universal appeal of the Datejust with the rarity and intrigue that connoisseurs crave.
This watch captures an era when Rolex experimented with dial artistry — and when subtle details like the Sigma signature were quietly woven into the brand’s history of excellence.
Ready to Make It Yours?
For £4,750, this 1978 Rolex Datejust Ref. 1603 with its rare blue Sigma dial is a vintage treasure that merges elegance, rarity, and Rolex heritage in perfect harmony.
Visit us at our new home inside Martin & Martin, 30 High Street, St Peter Port, Guernsey.
Buy online or book a private appointment to view this watch in person. Flexible payment options include:
• Apple Pay and all major debit and credit cards, payable directly on our website or your mobile device
• Bank transfers for a seamless transaction
• Secure email payment links for added convenience
• In-person card payments available in-store and by private appointment
• Book a private appointment via our website
As with all our watches, this Rolex has been checked against the Watch Register, ensuring it has not been reported lost or stolen. A Watch Register certificate is included for your peace of mind.
A rare blue Sigma-dial Datejust — a watch that perfectly balances beauty, heritage, and timeless Rolex craftsmanship.
Make: Rolex
Model: Datejust
Reference: 1603
Year: 1978
Movement: Automatic calibre
Box and papers: Box, service papers, Watch Register Certificate
Case: 36mm Oyster steel
Dial: Rare blue Sigma
Bracelet/Strap: Steel Jubilee bracelet
Condition: Very good vintage
Serviced: October 2025
Warranty: 6 month RHW warranty
The Blue Sigma Dial Classic
The Rolex Datejust Ref. 1603 represents the very best of 1970s Rolex craftsmanship — timeless, versatile, and unmistakably elegant. By the late 1970s, the Datejust had already cemented its reputation as the perfect everyday luxury watch, with its combination of precision timekeeping and enduring design. But this example takes that legacy to another level with a rare blue Sigma dial, a configuration seldom seen and highly sought after by collectors.
This particular watch is a full original example, presented on its Jubilee bracelet, and comes complete with an original Rolex box. It has just undergone a full service in October 2025, ensuring it performs perfectly while preserving its vintage authenticity.
Why You’ll Love It
• Rare Blue Dial: Deep, rich, and beautifully aged — the blue hue of this dial was one of the most striking (and least common) colour choices of the 1970s. Over the years, it has mellowed subtly, creating a unique character that no two examples share.
• Sigma Dial Significance: The ‘σ T SWISS T σ’ signature at the bottom of the dial denotes the use of solid gold indices and hands, a mark introduced by the Association Suisse pour l’Industrie Horlogère (ASIH) in the early 1970s to promote Swiss-made precious metal details. Rolex used this symbol discreetly, making these dials a fascinating and collectible piece of horological history.
• Original Condition: The components of this piece speaks to originality and care — the case edges remain well defined, the bracelet is good, and the dial is untouched.
• Fresh Service (October 2025): Professionally serviced by our accredited watchmaker and running to precise timekeeping standards.
• Complete with Original Rolex Box: An elegant finishing touch that enhances its collector appeal.
• At £4,750, this Datejust offers remarkable value for one of the most distinctive and historically significant 1603 configurations available.
Iconic Status
The Rolex Datejust has been the choice of leaders, artists, and icons for decades — worn by the likes of Martin Luther King Jr., Ronald Reagan, and Harrison Ford. But it’s examples like this one, with rare dial variations such as the blue Sigma, that stand apart in the collector world. They combine the universal appeal of the Datejust with the rarity and intrigue that connoisseurs crave.
This watch captures an era when Rolex experimented with dial artistry — and when subtle details like the Sigma signature were quietly woven into the brand’s history of excellence.
Ready to Make It Yours?
For £4,750, this 1978 Rolex Datejust Ref. 1603 with its rare blue Sigma dial is a vintage treasure that merges elegance, rarity, and Rolex heritage in perfect harmony.
Visit us at our new home inside Martin & Martin, 30 High Street, St Peter Port, Guernsey.
Buy online or book a private appointment to view this watch in person. Flexible payment options include:
• Apple Pay and all major debit and credit cards, payable directly on our website or your mobile device
• Bank transfers for a seamless transaction
• Secure email payment links for added convenience
• In-person card payments available in-store and by private appointment
• Book a private appointment via our website
As with all our watches, this Rolex has been checked against the Watch Register, ensuring it has not been reported lost or stolen. A Watch Register certificate is included for your peace of mind.
A rare blue Sigma-dial Datejust — a watch that perfectly balances beauty, heritage, and timeless Rolex craftsmanship.
