Front view
Dial, hands and bezel as delivered.
Case-back view
Case-back engraving and, where fitted, the sapphire display.
Movement
Calibre with its finishing and decoration.
On the wrist
Worn shot for proportion and strap drape.
Hublot · Square Bang
Hublot Square Bang 44 mm Slate Grade
Reference 52873OR.34
Reference at a glance
- Brand
- Hublot
- Collection
- Square Bang
- Model
- Hublot Square Bang 44 mm Slate Grade
- Reference number
- 52873OR.34
- Year / era
- 2010 · 2010s — modern production
- Complication
- Moon phase
- Movement
- In-house manual-winding
- Case material
- Grade 5 titanium
- Dial type
- Slate grey
- Strap / bracelet
- Jubilee bracelet
- Water resistance
- 300 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 44 mm
- Case thickness
- 9.4 mm
- Case material
- Grade 5 titanium
- Bezel
- Smooth polished
- Crystal
- Sapphire with internal AR treatment
- Dial
- Slate grey
- Hands
- Mercedes hour hand with Chromalight display
- Indexes
- Printed minute track with applied batons
- Bracelet / strap
- Jubilee bracelet
- Clasp / buckle
- Triple-folding clasp with safety catch
- Water resistance
- 300 m
Movement
- Movement / calibre
- Calibre 21D — In-house manual-winding
- Movement type
- Manual-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 55 hours
- Number of jewels
- 21 jewels
- Complications
- Moon phase
- Functions
- Hours, minutes, seconds, date
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 2010 – 2020
- Limited-edition quantity
- Not applicable
- 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
Hublot Square Bang 44 mm Slate Grade sits within Hublot's Square Bang line, introduced in 2010. It carries the house codes established since 1980 — grade 5 titanium case, slate grey dial and in-house manual-winding — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- The reference was originally planned as a one-year run and stayed in the catalogue for well over a decade.
- 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 House
Hublot
Brand facts
- Founding year
- 1980
- Founder
- Carlo Crocco
- Headquarters
- Switzerland
- Tier
- Luxury
- Major collections
- Big Bang, Classic Fusion, Spirit of Big Bang, MP Collection, Square Bang
- Signature technologies
- Anti-magnetic silicon escapement · Hand-applied guilloché dials · Certified chronometer regulation
- Famous movements
- In-house automatic, Superlative Chronometer · In-house automatic, chronometer certified · In-house automatic chronograph · In-house manual-winding
- Notable watches
- Hublot Big Bang 36 mm Salmon Stainless (1980) · Hublot Big Bang 43 mm Salmon Stainless (1982) · Hublot Big Bang 43 mm Meteorite Stainless (1996) · Hublot Classic Fusion 44 mm Meteorite 18k (1992)
Brand history
Hublot has spent more than 46 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Big Bang, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Carlo Crocco established Hublot in 1980, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Hublot calibre produced today.
Historical milestones
1980
Carlo Crocco founds Hublot in Switzerland.
1990
Hublot enters the modern collector market with its signature lines.
2024
Hublot continues to produce Big Bang, Classic Fusion, Spirit of Big Bang and other icons in limited numbers.