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Rolex Sea-Dweller ref 16660 - Very Rare Dial MK 3 Missing Hyphen & Cracked Spider - Full Service

Pre-owned () | Year of production 1983 | Original box | No original papers
+ $252 for insured shipping to
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Basic Info

Listing code JI5UO7
Brand Rolex
Model Sea-Dweller
Reference number 16660
Dealer product code 44752
Movement Automatic
Case material Steel
Bracelet material Steel
Year of production 1983 (Approximation)
Scope of delivery
Original box, no original papers
Gender Men's watch/Unisex
Location Italy, Prato
Price €35,000 (= $38,458)
Availability Item is in stock


Movement Automatic
Caliber/movement Rolex 3035
Base caliber Rolex 3035
Power reserve 48 h
Number of jewels 27


Case material Steel
Case diameter 40 mm
Water resistance Over 120 ATM
Bezel material Steel
Crystal Sapphire crystal
Dial Black
Dial numerals No numerals


Bracelet material Steel
Bracelet color Steel
Clasp Fold clasp
Clasp material Steel




Central seconds, Luminous hands, Genevian Seal, Chronometer, Rotating Bezel, Limited Edition, Screw-Down Crown, Helium Valve, Quick Set, Only Original Parts, Luminous indices


This is an automatically translated text.
by purchasing the watch you agree that you have read everything THAT IS described below!

Rolex Oyster Perpetual Date ref 16660 made of steel. Case with serial 836XXXX.
40 mm diameter.
Very rare black polished Mark iii dial, main feature of the Mark iii: the hyphen between the words sea and dweller is missing, to which is added and greatly increases the rarity, the fact that on the surface there are very slight cracks on the polished finish of the varnish, in the shape of the famous and rare "spider's web" visible only at certain inclinations when exposed to light. Luminescent* "tumbler" hour markers, i.e., surrounded by a white gold ring and luminescent hands. Date window at 3 o'clock.
Black steel rotating bezel with tachymeter scale. Sapphire crystal, Rolex signed screw-down case back, Rolex signed steel screw-down knurled crown. Oyster model steel bracelet with Oysterclasp clasp.
Water resistance over 120 atm.
*Luminescence belonging to the watch model released from the parent company but not guaranteed.

historical background on the dial
The dial of ref. 16660 originally had a matte finish and tritium markers. It was later replaced by the "bicchierini" dial. The word "bicchierini," coined by Italian collectors, identifies a particular dial with indexes surrounded by a ring, mostly in white gold. Our close-up photos of the dial show not only the famous and rare "spider's web," but also the main feature of the Mark iii: the hyphen between the words sea and dweller is missing. Of all the Sea-Dweller watches produced by Rolex since 1967, this is the only one that has no hyphen between Sea and Dweller. Perhaps because of the lack of the hyphen, Rolex only produced the Mark Ill model for a very short period of time and very quickly replaced it with the Mk iv. Reason why nowadays the very few examples of Rolex Ref. 16660 with the Mark iii dial, i.e., without the hyphen between the words Sea and Dweller, are extremely rare almost unique pieces. added to this is the fact that our splendid specimen also has the famous and rare "spider's web," which certainly makes it a totally unique watch.

Complete maintenance performed by our watchmaker on Jan. 2024, interventions performed: complete washing, complete movement overhaul*, rotor pivot replacement, black gaskets and glass gasket replacement, external bracelet and case polishing, small restoration of enamel in some places on case back, water resistance check.

* Our complete movement overhaul includes:
Opening the watch, pre-washing the movement, disassembly of all movement components, preventive replacement of worn and damaged components, washing of all components, movement assembly and complete lubrication, time adjustment, casing of the movement in the watch, and final verification of perfect functioning.

Next recommended maintenance January 2029.

12-month warranty on complete operation, starting from the day the watch is received.

the watch will come with certificate of expertise to ensure 100% AUTHENTICITY.

To view the watch in person, an appointment must be made.

watch details sheet:
Brand: Rolex
Model: Rolex Sea-Dweller ref. 16660 year about 1983
Watch Condition: Used
Movement Condition: Excellent. Covered by 12 months warranty
Case Condition: Very good with minor signs of use
Dial Condition: Very good with very slight cracks on paint in the shape of a spider web visible only at certain angles when exposed to light
Glass Condition: Very good
Official strap: Yes
Strap condition: Very good with minor signs of use
Measurements of bracelet when closed: 21 cm
Condition of inner box: Very good
Condition of outer box: Very good
Country of origin: Switzerland.

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Professional dealer | On Chrono24 since 2017
Prato, Italy
English, Italian
288 watches sold
18 active listings
Prato, Italy
English, Italian


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