Rolex Day-Date 18048

Day-Date → 18048

The 18048 is the diamond-bezel Day-Date of the sapphire-crystal era, the 5-digit successor to the 4-digit gem-set 1804. It is a yellow-gold President with a factory diamond-set bezel of 44 round brilliants, caliber 3055 and a sapphire crystal, and it ran from the late 1970s to 1988. The diamond bezel was a catalogue option rather than a rarity, which makes the 18048 a liquid, well-understood watch; the exotic examples are the special dials and the diamond-set "Octopus" bracelet rather than the reference itself.

Core facts

detail	value
reference	18048
family	Day-Date
production	circa 1977/78 to 1988
movement	caliber 3055, 27 jewels, 28,800 vph, single quickset (date); sapphire era
case	36mm 18k yellow gold President
crystal	sapphire
bezel	factory diamond-set, 44 round brilliants
bracelet	President 8385 with hidden Crownclasp, solid links
dial	diamond-index champagne and silver, mother-of-pearl, stone, Stella, Roman, pavé
crown	Twinlock screw-down
siblings	18038 (fluted), 18039 (white-gold fluted), 18049 (white-gold diamond), 18046 (platinum diamond), 18078 / 18079 (bark)
predecessor	1804 (4-digit gem-set)
successor	18248 (caliber 3155, double quickset)

Where it sits in the line

The 18048 is the diamond-bezel member of the first 5-digit Day-Date generation, the sapphire-crystal continuation of the diamond thread that runs from the 4-digit 1804 through the 18048 to the caliber-3155 18248. The 5-digit references split by metal and bezel: the 18038 is the yellow-gold fluted volume reference, the 18039 its white-gold version, and the diamond-bezel cases follow the same logic, 18048 in yellow gold, 18049 in white gold and 18046 in platinum. Everything behind the bezel is 18038: the same 36mm case, caliber 3055, sapphire crystal and President bracelet. The diamond bezel is the only thing that separates the 18048 from the volume reference, and the 18038 entry holds the shared account.

Production outline

The 18048 ran from the late 1970s, when the 5-digit references took over from the 4-digit line with sapphire crystals and the caliber 3055, until 1988, when the caliber 3155 and its double quickset arrived and the diamond-bezel reference became the 18248. The diamond bezel was a factory catalogue option across the run rather than a limited series, so the 18048 was made in reasonable numbers against the volume of the fluted 18038. No Rolex production figure has surfaced; the per-reference estimates that circulate for the diamond and bark siblings are dealer approximations rather than factory data. Within the run the reference is stable, a single-spec watch whose variety lives in the dial rather than in any change to the case or movement.

Movement notes

The 18048 runs the caliber 3055, the first quickset Day-Date movement: 27 jewels, 28,800 vph, with a date quickset from the crown. The day still has to be advanced by running the hands through midnight, since the day quickset did not arrive until the caliber 3155 in 1988. That single-versus-double quickset distinction is exactly what separates the 18048 from its successor the 18248. The movement is otherwise the shared sapphire-era Day-Date caliber, COSC-certified and carried across the whole first 5-digit generation. The Reference:Movements page holds the caliber lineage, and the 18038 entry covers the 3055 in detail.

Dial map

The diamond bezel is the constant on the 18048; the dial is where the variety lives. The common configuration is a champagne or silvered dial with diamond hour markers, often with baguette diamonds at six and nine. Beyond that the reference carries the full range of Day-Date special dials of the period: mother-of-pearl, stone dials such as onyx and lapis, Roman-numeral, diamond pavé, blue dégradé, and lacquered Stella colours. A green-Stella 18048 with the red Omani Khanjar emblem documents the reference's reach into the Gulf special orders. The dial does not change the reference, but on a watch whose bezel is a catalogue option, the dial is what sets one 18048 apart from the next; the deep dial taxonomy that spans the President line sits on the 1803 entry.

Case, bezel, crystal, and crown

The case is the 36mm yellow-gold Oyster shared across the 5-digit Day-Date, with a sapphire crystal and Cyclops, a Twinlock screw-down crown and a screw-down caseback. The defining feature is the factory diamond-set bezel, a single row of 44 round brilliants. Because the case is gold and the bezel is straightforward to set, aftermarket diamond bezels and dials are common on the 18048, and they are the main authenticity question on the reference. A factory bezel carries 44 hand-matched stones of even table size and orientation; aftermarket bezels often use a different count, frequently 42, with mismatched stones, so attribution rests on the quality and proportion of the setting and on Rolex paperwork rather than on a listing's label.

Bracelets, end links, and clasps

The 18048 wears the President bracelet, reference 8385, with the concealed Crownclasp and the solid links of the 5-digit era, heavier and more rigid than the hollow-link 4-digit bracelets. The headline factory upgrade is the diamond-set President, nicknamed the "Octopus" for the way the stones run down the bracelet, which turns an ordinary diamond Day-Date into an auction-grade object. As with any President, a clasp date code dates the bracelet rather than the head, and the cross-family bracelet detail sits on Reference:Bracelets.

Special branches

Special dials

The 18048's variety is in its dials. Documented examples run from mother-of-pearl and pavé through onyx and other stone dials to lacquered Stella colours, including a green-Stella example carrying the Omani Khanjar emblem. The blue dégradé and black-lacquer diamond dials are among the more sought configurations. Each is a catalogue or special-order dial on the same diamond-bezel case, so the dial is the identity of the individual watch.

The "Octopus"

The fully diamond-set President bracelet, the "Octopus", is the reference's headline branch and the configuration that reaches the major auction houses. Where a standard diamond-bezel 18048 trades as a liquid known quantity, an "Octopus" with a special dial is the version that draws the strongest results.

Auction record

The 18048 is a liquid, well-understood reference rather than a headline auction lot, since the diamond bezel was a catalogue option rather than a rarity. The exceptions are the special configurations. Antiquorum sold a champagne-dial "Octopus", with the diamond-set President bracelet, in Monaco in 2022 for EUR 96,200, and Sotheby's catalogued a black-lacquer "Octopus" the following year. A standard champagne diamond-index 18048 sold at Monaco Legend in 2022 for EUR 22,100, which is closer to the reference's everyday level. For a standard yellow-gold diamond-bezel 18048 with a diamond-index dial, the secondary market sits roughly in the high-five-figure dollar range, with special dials, original factory gem-setting and full sets driving the premium.

date	house	configuration	result
2022	Antiquorum Monaco, lot 81	champagne diamond dial, diamond-set "Octopus" bracelet, c.1981	EUR 96,200
2023	Sotheby's Important Watches Part I, lot 51	black-lacquer diamond dial, "Octopus" bracelet, c.1981	published lot reference
2022	Monaco Legend, Exclusive Timepieces 28, lot 243	champagne diamond-index dial, President bracelet, 1985	EUR 22,100
2019	Sotheby's Important Watches, lot 1063	blue dégradé diamond dial, 44-diamond bezel, c.1980	published lot reference

Sources