Roland Jarvis month-going longcase regulator with planetarium and perpetual calendar
Record status
Individual type · partial
Period
circa 1982
This month-going, spring-driven longcase regulator is attributed by the source to Roland Jarvis of Hastings, dating to circa 1982. The ebonised case stands approximately 197 cm high with brass inlays, a rectangular glazed hood, a tapered trunk, and a brass-mounted plinth base.
Its display includes an 8-inch planetarium, perpetual calendar with leap year indication, mean time, astronomical indications, tidal dial, and power reserve indication. According to the source, the substantial multi-plated single fusee movement features a deadbeat escapement with a 15-second remontoir and a gridiron pendulum with temperature compensation.
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.
Technical characteristics
- Type
- Regulator
- Height
- 197 cm (6 ft 5.5 in)
- Place recorded
- United Kingdom
- Maker and Location
- Roland Jarvis, Hastings
- Maker / attribution
- Roland Jarvis
- Movement Construction
- Substantial multi-plated single fusee movement with deadbeat escapement to 15-second remontoir
Design
- Visible features
- • Tall ebonised wooden case with light-toned metallic brass inlay framing. • Upper rectangular hood enclosing an extensive astronomical and calendar dial complex with an arched surround. • Tapered trunk door featuring a shaped, arched glazed aperture. • Visible pendulum assembly with gridiron frame and circular brass bob suspended within the trunk window. • Plinth base accented by a curved brass inlaid semicircular motif.
- Identity and Case Architecture
- The clock is documented by Bonhams as a brass-inlaid, ebonised spring-driven longcase regulator standing 197 cm (6 ft 5.5 in) tall, attributed to Roland Jarvis of Hastings circa 1982. The ebonised case incorporates a rectangular glazed hood over a tapered trunk with a shaped glazed door panel, set upon a brass-mounted plinth base. Visual observations record a tall ebonised wooden case detailed with light-toned metallic brass inlay framing. A shaped, arched glazed aperture in the tapered trunk door exposes the pendulum assembly, and the plinth base displays a curved brass inlaid semicircular design.
- Astronomical and Calendar Dial Scheme
- The dial complex centers around an 8-inch planetarium with a central month and astronomical display. Directly beneath are opposing dials for local time and day alongside a perpetual calendar showing leap year cycles. The lower dial configuration features concentric rings indicating mean time, age of the moon, and an annual calendar. According to the catalogue description, additional indications include sunrise and sunset, solar and lunar positions, a revolving spherical moonphase, tidal dial, nodal hands, and a state of wind (power reserve) dial.
- Reported Movement and Pendulum Specifications
- The movement mechanism is reported in the auction catalogue as a substantial multi-plated single fusee movement operating on a month-going duration, governed by a deadbeat escapement to a 15-second remontoir. The mean time train is noted to use epicyclic gearing, while the subsidiary trains are individually constructed on sub-frames. The pendulum is described as a steel and aluminium gridiron construction fitted with an elliptical brass bob and incorporating temperature indication. In the photograph, the gridiron frame and circular brass bob are visible suspended through the glazed trunk aperture.
Identification
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: Internal movement gearing, fusee, and remontoir mechanism are not visible in the photograph and rely entirely on catalogue statements.
- Research required: Attribution to Roland Jarvis and the circa 1982 date are source-reported.