Minase
Minase Masterpiece 44 mm Mother-of-pearl 18k
Photography on request
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.
Minase · Masterpiece
Minase Masterpiece 44 mm Mother-of-pearl 18k
Reference 22154OR.94
Reference at a glance
- Brand
- Minase
- Collection
- Masterpiece
- Model
- Minase Masterpiece 44 mm Mother-of-pearl 18k
- Reference number
- 22154OR.94
- Year / era
- 2005 · 2000s — modern production
- Complication
- Tourbillon
- Movement
- Eco-Drive solar quartz
- Case material
- 18k yellow gold
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Oyster bracelet
- Water resistance
- 30 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 44 mm
- Case thickness
- 8.1 mm
- Case material
- 18k yellow gold
- Bezel
- Unidirectional ceramic 60-minute
- Crystal
- Sapphire with internal AR treatment
- Dial
- Mother-of-pearl
- Hands
- Mercedes hour hand with Chromalight display
- Indexes
- Printed minute track with applied batons
- Bracelet / strap
- Oyster bracelet
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 30 m
Movement
- Movement / calibre
- Calibre 22F — Eco-Drive solar quartz
- Movement type
- High-frequency automatic
- Frequency
- 25,200 vph (3.5 Hz)
- Power reserve
- 55 hours
- Number of jewels
- 31 jewels
- Complications
- Tourbillon
- Functions
- Dive time, running seconds
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 2005 – 2015
- Limited-edition quantity
- Not applicable
- Current market information
- Consistently trades above retail; waiting lists at authorised dealers remain long.
Designer
Gérald Genta
Gérald Genta (1931–2011) trained as a goldsmith in Geneva and became the most influential watch designer of the 20th century. Working freelance, he sketched the Audemars Piguet Royal Oak overnight in 1970, followed by the Patek Philippe Nautilus, the IWC Ingenieur SL and the Bulgari Bulgari — defining the integrated-bracelet luxury sports watch as a category.
Historical significance
Minase Masterpiece 44 mm Mother-of-pearl 18k sits within Minase's Masterpiece line, introduced in 2005. It carries the house codes established since 2005 — 18k yellow gold case, mother-of-pearl dial and eco-drive solar quartz — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
- The reference was originally planned as a one-year run and stayed in the catalogue for well over a decade.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
The House
Minase
Brand facts
- Founding year
- 2005
- Founder
- Kyowa Co. / Susumu Kitamura
- Headquarters
- Japan
- Tier
- Japanese
- Major collections
- Divido, Five Windows, Horizon, Masterpiece
- Signature technologies
- In-house hairspring production · Proprietary case-hardening and polishing
- Famous movements
- Automatic, 24 jewels · Eco-Drive solar quartz · High-accuracy quartz · Spring Drive
- Notable watches
- Minase Divido (2000) · Minase Horizon (2001) · Minase Uruga (2002)
Brand history
Minase has spent more than 21 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Divido, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Kyowa Co. / Susumu Kitamura established Minase in 2005, working from Japan at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Minase calibre produced today.
Historical milestones
2005
Kyowa Co. / Susumu Kitamura founds Minase in Japan.
2024
Minase continues to produce Divido, Five Windows, Horizon and other icons in limited numbers.