Credor
Credor Signo 37 mm Slate Platinum
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.
Credor · Signo
Credor Signo 37 mm Slate Platinum
Reference 20658OR.91
Reference at a glance
- Brand
- Credor
- Collection
- Signo
- Model
- Credor Signo 37 mm Slate Platinum
- Reference number
- 20658OR.91
- Year / era
- 1974 · 1970s — quartz-crisis era
- Complication
- Annual calendar
- Movement
- Eco-Drive solar quartz
- Case material
- Platinum 950
- Dial type
- Slate grey
- Strap / bracelet
- Milanese mesh
- Water resistance
- 150 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 37 mm
- Case thickness
- 12.6 mm
- Case material
- Platinum 950
- Bezel
- Octagonal with 8 hexagonal screws
- Crystal
- Anti-reflective sapphire, double-domed
- Dial
- Slate grey
- Hands
- Rhodium-plated baton hands with luminous fill
- Indexes
- Applied faceted white-gold indexes
- Bracelet / strap
- Milanese mesh
- Clasp / buckle
- Triple-folding clasp with safety catch
- Water resistance
- 150 m
Movement
- Movement / calibre
- Calibre 41C — Eco-Drive solar quartz
- Movement type
- Manual-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 70 hours
- Number of jewels
- 27 jewels
- Complications
- Annual calendar
- Functions
- Hours, minutes, seconds, date
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 1974 – 1983
- 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
Credor Signo 37 mm Slate Platinum sits within Credor's Signo line, introduced in 1974. It carries the house codes established since 1974 — platinum 950 case, slate grey dial and eco-drive solar quartz — 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 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
Credor
Brand facts
- Founding year
- 1974
- Founder
- Seiko
- Headquarters
- Japan
- Tier
- Japanese
- Major collections
- Eichi, Linealx, Node, Signo
- Signature technologies
- Hand-applied guilloché dials · Composite and ceramic case materials · Certified chronometer regulation
- Famous movements
- Spring Drive · Eco-Drive solar quartz · Automatic, 24 jewels · High-accuracy quartz
- Notable watches
- Credor Eichi 36 mm Blue Stainless (2001) · Credor Eichi 43 mm Silvered 18k (1974) · Credor Eichi 39 mm Meteorite 18k (1974) · Credor Linealx 41 mm Black 18k (1974)
Brand history
Credor has spent more than 52 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Eichi, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Seiko established Credor in 1974, working from Japan at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Credor calibre produced today.
Historical milestones
1974
Seiko founds Credor in Japan.
1990
Credor enters the modern collector market with its signature lines.
2024
Credor continues to produce Eichi, Linealx, Node and other icons in limited numbers.