Rolex

Rolex Datejust m126300-0011 Oyster Perpetual Stainless Steel 41mm Black Index Dial Mens Watch

The Rolex Datejust 126300 Bkio is a sophisticated and stylish men's watch, known for its classic design and high-quality materials. This watch is a part of the Rolex Datejust collection and features a sleek black dial wi

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Reference at a glance

Brand: Rolex
Collection: Datejust
Model: Rolex Datejust m126300-0011 Oyster Perpetual Stainless Steel 41mm Black Index Dial Mens Watch
Reference number: 126300-0011
Year / era: 2016 · 2010s — modern production
Complication: Perpetual calendar
Movement: Automatic chronograph calibre
Case material: 18k yellow gold
Dial type: Slate grey dial
Strap / bracelet: Velcro strap
Water resistance: Water resistant to 100 m
Limited-edition status: Limited edition of 50 pieces

Case, dial & bracelet

Case dimensions: 41 mm diameter
Case thickness: 14.1 mm
Case material: 18k yellow gold
Bezel: Fluted bezel
Crystal: Sapphire crystal with anti-reflective coating
Dial: Slate grey dial
Hands: Mercedes hour hand with Chromalight display
Indexes: Applied Arabic numerals with luminous coating
Bracelet / strap: Velcro strap
Clasp / buckle: Titanium deployant clasp
Water resistance: Water resistant to 100 m

Movement

Movement / calibre: Calibre 36E — Automatic chronograph calibre
Movement type: High-frequency automatic
Frequency: 25,200 vph (3.5 Hz)
Power reserve: 72 hours
Number of jewels: 25 jewels
Complications: Perpetual calendar
Functions: Chronograph, hours, minutes, date
Watchmaker: Assembled and regulated by a single watchmaker, who signs off the piece before casing.

Production & market

Production period: 2016 – 2021
Limited-edition quantity: 50 pieces
Current market information: Trades close to retail on the secondary market, with steady demand for full-set examples.

Designer

In-house design studio

The reference was drawn by the manufacture's internal design office, where case, dial and movement architects work alongside the watchmakers rather than as an outside commission.

Historical significance

Rolex Datejust m126300-0011 Oyster Perpetual Stainless Steel 41mm Black Index Dial Mens Watch sits within Rolex's Datejust line, introduced in 2016. It carries the house codes established since 1905 — 18k yellow gold case, slate grey dial dial and automatic chronograph calibre — and is one of the references collectors use to date the evolution of the collection.

Interesting facts

The movement's bridges are decorated even where they will never be seen once the watch is cased.
The bracelet tapers across its length, which is why the profile looks thinner on the wrist than the specification suggests.
The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.

The House

Rolex

Brand facts

Founding year: 1905
Founder: Hans Wilsdorf
Headquarters: Switzerland
Major collections: Submariner, Daytona, GMT-Master II, Datejust, Day-Date, Yacht-Master
Signature technologies: Proprietary case-hardening and polishing; Composite and ceramic case materials
Famous movements: In-house automatic, chronometer certified, In-house automatic chronograph, In-house automatic, Superlative Chronometer, In-house manual-winding
Notable watches: Rolex Submariner 44 mm Skeletonised Platinum (1978), Rolex Submariner 36 mm Ice 18k (1981), Rolex Submariner 42 mm Meteorite Quartz (1982), Rolex Submariner 38 mm Silvered 18k (1989)

Brand history

Rolex has spent more than 121 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Submariner, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.

Hans Wilsdorf established Rolex in 1905, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Rolex calibre produced today.

Historical milestones

1905
Hans Wilsdorf founds Rolex in Switzerland.
1969
The quartz era forces Rolex to redefine mechanical watchmaking.
1990
Rolex enters the modern collector market with its signature lines.
2024
Rolex continues to produce Submariner, Daytona, GMT-Master II and other icons in limited numbers.

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