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.
Panerai · Radiomir
Panerai Radiomir 40 mm Mother-of-pearl Stainless
Reference 66440ST.72
Reference at a glance
- Brand
- Panerai
- Collection
- Radiomir
- Model
- Panerai Radiomir 40 mm Mother-of-pearl Stainless
- Reference number
- 66440ST.72
- Year / era
- 1996 · 1990s — mechanical revival
- Complication
- Time only
- Movement
- In-house automatic, chronometer certified
- Case material
- Stainless steel
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Jubilee bracelet
- Water resistance
- 100 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 40 mm
- Case thickness
- 11.3 mm
- Case material
- Stainless steel
- Bezel
- Smooth polished
- Crystal
- Flat sapphire with Cyclops lens
- Dial
- Mother-of-pearl
- Hands
- Faceted dauphine hands, polished by hand
- Indexes
- Printed minute track with applied batons
- Bracelet / strap
- Jubilee bracelet
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 9B — In-house automatic, chronometer certified
- Movement type
- High-frequency automatic
- Frequency
- 28,800 vph (4 Hz)
- Power reserve
- 55 hours
- Number of jewels
- 27 jewels
- Complications
- Time only
- Functions
- Hours, minutes, seconds, date
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 1996 – 2006
- Limited-edition quantity
- Not applicable
- Current market information
- Consistently trades above retail; waiting lists at authorised dealers remain long.
Designer
Emmanuel Gueit
Emmanuel Gueit came from a family of Geneva jewellers and was barely into his twenties when he drew the oversized Royal Oak Offshore in 1993 — a watch the house's traditionalists resisted and collectors turned into an icon.
Historical significance
Panerai Radiomir 40 mm Mother-of-pearl Stainless sits within Panerai's Radiomir line, introduced in 1996. It carries the house codes established since 1860 — stainless steel case, mother-of-pearl dial and in-house automatic, chronometer certified — 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 case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
The House
Panerai
Brand facts
- Founding year
- 1860
- Founder
- Giovanni Panerai
- Headquarters
- Italy
- Tier
- Luxury
- Major collections
- Luminor, Radiomir, Submersible, Luminor Due, Quaranta
- Signature technologies
- Hand-applied guilloché dials · Proprietary case-hardening and polishing · In-house hairspring production
- Famous movements
- In-house manual-winding · In-house automatic, chronometer certified · In-house automatic, Superlative Chronometer · In-house automatic chronograph
- Notable watches
- Panerai Luminor 39 mm Black Stainless (1968) · Panerai Luminor 44 mm Salmon Ceramic (1955) · Panerai Radiomir 40 mm Skeletonised Quartz (1963) · Panerai Radiomir 44 mm Green Carbon (1995)
Brand history
Panerai has spent more than 166 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Luminor, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Giovanni Panerai established Panerai in 1860, working from Italy at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Panerai calibre produced today.
Historical milestones
1860
Giovanni Panerai founds Panerai in Italy.
1899
Panerai earns its first international recognition for precision timekeeping.
1969
The quartz era forces Panerai to redefine mechanical watchmaking.
1990
Panerai enters the modern collector market with its signature lines.
2024
Panerai continues to produce Luminor, Radiomir, Submersible and other icons in limited numbers.