Riefler Invar Pendulum
Record status
Individual type · partial
Period
c. 1920
According to the auction catalog, this precision clock pendulum was produced in Germany around 1920 by Riefler. It is constructed with nickel and iron alloy components and measures 47 inches in overall length.
The lenticular bob is stamped with marks indicating Riefler, München, patent D.H.R. 100870, and serial number 1795. The assembly is fitted with a 40-tooth rating nut and locking device beneath the bob, and the auction record notes that the top pendulum hook is also stamped with number 1795.
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
- Pendulum & weight
- Length
- 47 inches
- Origin
- Germany
- Materials
- Nickel/iron alloy components
- Rating Nut
- 40-tooth rating nut with lock
- Bob Markings
- Riefler, Munchen, D.H.R. 100870, 1795.
- Hook Marking
- Stamped 1795
- Place recorded
- Germany
- Maker / attribution
- Sigmund Riefler
Design
- Visible features
- • Circular lenticular bob fitted over a cylindrical rod • Toothed adjustment rating nut visible beneath the bob with bracket mechanism • Matted metallic surface showing minor patina and surface wear
- Object Identity and Markings
- Catalogued as a precision clock component from Germany dating to circa 1920, this assembly is catalogued under the title "Riefler Invar Pendulum". The catalog description notes that the bob is marked "Riefler , Munchen , D.H.R. 100870 , 1795.", and that the pendulum hook is stamped "1795". The overall length recorded in the catalog is 47 inches. While the record gives the origin as Germany and c. 1920, the specific maker Sigmund Riefler is not explicitly spelled out in full in the text of the lot description, though the bob is marked with the Riefler name and Munich location.
- Observed Construction and Mechanism
- The visible portion of the assembly features a circular lenticular bob fitted over a cylindrical rod. Positioned directly beneath the bob is a bracket mechanism and a toothed adjustment rating nut. The auction description notes that the assembly comprises "nickel/iron alloy components" and includes a "40-tooth rating nut with lock". Direct visual observation confirms the toothed adjustment rating nut and bracket beneath the bob, though individual tooth counts cannot be independently confirmed from the photograph.
- Surface Condition and Documentation Limitations
- In the catalog photograph, the assembly presents a matted metallic surface showing minor patina and surface wear. In its condition notes, the auction house reports: "Pendulum lacking original high polish." Documentation of the object remains limited. The upper section of the 47-inch assembly, including any suspension mechanism and the hook stamped 1795, is out of frame in the single catalog image, leaving the reported hook stamping unverified by visible photography.
Identification
- Serial number
- 1795
- 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: Source reports the pendulum lacks original high polish
- Research required: Top suspension spring or upper hook details are out of frame in Photo 0