The Ultimate Reference
Double Red Sea Dweller
DRSD.com · Est. 1999
Rolex Reference 1665 · 20+ Years of Research
The Most Extensively Documented
Sea-Dweller Archive on the Internet
From Patent Pending rarities with fewer than 120 documented examples worldwide, to full COMEX and Military provenance research. Every dial variant. Every caseback. Every serial batch.
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20+
Years of Research
1665
Reference Number
5
Dial Variants
100%
Feedback Since 1999
Reference Documentation
The 1665 Family
01
The Patent Pending Sea-Dweller
The rarest of all DRSD variants. Three known serial batches. Fewer than 120 documented examples worldwide. The most extensively researched PPDRSD database on the internet.
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02
Dial Variant Guide
Complete photographic documentation and authentication guide for all five dial variants. Serial ranges, printing characteristics, and collector authentication notes.
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03
Caseback Documentation
Definitive reference for all 1665 caseback variants. Engravings, internal markings, date stamps, and serial correlation across every known production batch.
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04
The Transitional DRSD
The bridge between Patent Pending and production Double Red. A small serial window with unique dial characteristics that collectors and authenticators must know.
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05
DRSD Buyers Guide
Everything you need before purchasing a Double Red Sea-Dweller. Red flags, authentication checkpoints, serial batch guide, and pricing context from 20+ years of market research.
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All Reference Categories
Dial Variants
The Five Marks
I
First Issue
Mark I — The Shift Dial
The earliest production Double Red dial. Characterized by the distinctive “shift” printing alignment where the depth text sits slightly off-center. Known for its deep gloss surface and original lume plots.
Serial: ~1.7M–1.9M
Circa 1967–1969
Extremely Scarce
Full Shift Dial / Mark I Reference
II
Second Issue
Mark II — Refined Printing
The printing shift corrected, settling into the standard Double Red layout. Subtle font weight differences distinguish it from later marks. Strong lume condition specimens remain highly collectible.
Serial: ~1.9M–2.1M
Circa 1969–1970
Scarce
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III
Third Issue
Mark III — Classic Configuration
The most commonly encountered early DRSD dial. Text printing stabilized. Caseback correlation is well-documented. Considered the benchmark for authentication comparisons across the entire 1665 family.
Serial: ~2.1M–2.5M
Circa 1970–1972
Most Common DRSD
Mark III & Red Sub Dials
IV
Fourth Issue
Mark IV — Late Production
Transitional characteristics begin to appear. Font weight changes in the depth marking. Serial ranges overlap with early White Sea-Dweller production periods, making provenance research essential.
Serial: ~2.5M–3.1M
Circa 1972–1974
Transitional Period
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V
Final Issue
Mark V — End of the Line
The final Double Red configuration before the transition to White Sea-Dweller production. Distinct printing characteristics and caseback engravings mark the close of one of horology’s most documented eras.
Serial: ~3.1M–3.8M
Circa 1974–1977
Final DRSD Variant
Full Mark V Reference
VI
Sixth Issue
Mark VI — Later Production
Continued evolution of the Double Red dial into later serial ranges. Printing refinements and caseback changes distinguish this variant from the Mark V. An important reference point for late-production 1665 authentication.
Late Production
1665 Reference
Full Mark VI Reference
VII
Seventh Issue
Mark VII — Final Configuration
The last documented dial variant in the Double Red Sea-Dweller production sequence before the transition to the White Sea-Dweller. Extremely well-documented with full caseback and serial correlation.
Final Variant
1665 Reference
Full Mark VII Reference
COMEX · Professional Issue
COMEX Sea-Dweller
Issued to professional divers of the French deep-sea company COMEX. Full provenance research and caseback documentation across all issued references — 5514, 1665, 1680, 16610, 16660, 16600.
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Military · Issued Reference
Military Sea-Dweller
Documented military-issued references with full provenance. Serial batch analysis, caseback markings, and authentication guide. Includes Military Submariners in action and code detail documentation.
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About This Archive
20+ Years of Collector Research
Founded in 1999, DRSD.com is the internet’s oldest and most comprehensive reference for the Rolex 1665 Double Red Sea-Dweller. Content by Ed Delgado. Trusted by collectors, dealers, and auction houses worldwide.
Start with the Buyers Guide
<120
PPDRSD Examples Documented
3
PPDRSD Serial Batches
7
DRSD Dial Variants
1999
Online Since