COMEX · Rolex Sea-Dweller 1665 · Dial Reference
COMEX 1665
The COMEX 1665 Sea-Dweller
Reference
Rolex Sea-Dweller 1665
Delivered to COMEX
1977–1981
Production Quantity
Approx. 300 examples
COMEX Serial Range
2000–2300
Dial Variants
Original 600m rating · Replacement 610m rating
Helium Escape Valve
Yes (HEV)
Original Dial Name
The Pisani Dial — named in honour of collector Marcello Pisani
The 1665s were delivered to COMEX from 1977 to 1981. The dials were quite distinctive and very different from the “white” Sea-Dweller. Only approximately 300 examples were delivered, with COMEX serial numbers running in the range of 2000–2300.
Of course there was the original dial with a 600m depth rating, and the replacement service dial with a 610m rating — an important distinction for collectors authenticating these watches today.
The original dial configuration on the COMEX 1665 is known as the Pisani Dial — named in honour of collector Marcello Pisani, a dear friend and tireless contributor to COMEX and Sea-Dweller research.
Dial Variants
Original Dial — “Pisani Dial”
Depth rating: 600m / 2000ft
Tritium lume · COMEX logo
Distinctive printing unique to the COMEX issue
Tritium lume · COMEX logo
Distinctive printing unique to the COMEX issue
Service / Replacement Dial
Depth rating: 610m / 2000ft
Issued when original returned to Rolex for service
Later white glossy dial with updated depth rating
Issued when original returned to Rolex for service
Later white glossy dial with updated depth rating
The Original Dial (Pisani Dial)
Here is the original dial — this configuration is named the Pisani Dial.
The original COMEX 1665 dial — known as the Pisani Dial — with 600m depth rating.
Original vs. White / Service Dials
The image below shows the differences between the regular original dial and the white or service replacement dials — a key point of reference for authentication.
Side-by-side comparison of the regular original dial and the white or service replacement dial.
Dial Detail — Photography by Shin-An
The following photographs are by Shin-An — an honourable collector and the founder of the original COMEX reference website.
Photo: Shin-An
Photo: Shin-An
Service Dial & Original Dial Pair
The photo below is of a service dial from Rolex. Compare it carefully to the original Pisani Dial above — note the depth rating, printing style, and lume application differences.
A Rolex service dial. Compare to the original Pisani Dial — note the 610m depth rating.
Photo: Ed Delgado
A pair of original COMEX 1665 dials.
Photo: Ed Delgado