IWC Portofino oversize moon phase wristwatch, Ref. 5251
Record status
Individual type · partial
Period
circa 1990
This IWC Portofino, often referred to as a pocket-wristwatch, is an oversize neo-vintage timepiece featuring a distinctive 46 mm 18K gold case with a slim profile of approximately 6 mm.
The white dial is complemented by a moon phase complication and an elegant manual movement, Calibre 9521, which includes 19 jewels and a hand-formed Breguet mainspring. Constructed from 161 individual components, the movement features gilded decoration and gold chatons, following a classical layout with two bridges and four cocks. First introduced in 1984, the model integrates a historic pocket watch movement with a sophisticated wristwatch design, serving as the inspiration for the wider Portofino collection.
This specific example features push back housing and carries Movm. No. 2316330 and Case No. 2291866.It represents a transition in IWC’s design language, blending legacy technical craftsmanship with refined aesthetics.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Physical characteristics
- Height
- 6 mm
- Diameter
- 46 mm
- Material
- 18 K gold
Technical characteristics
- Jewels
- 19
- Movement
- Manual, Calibre 9521
- Reference
- 5251
- Case number
- 2291866
- Complications
- moon phase
- Movement number
- 2316330
Design
- Case back
- push back
- Dial color
- White
Identification
- Source note
- Described from a single auction-house listing published on Invaluable (reproduced with Invaluable's permission). Details apply to that one example; other examples of the type may differ, and the listing is supplementary evidence, not authentication.
- Maker named in listing
- IWC / Intern. Watch Co.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.