Pocket watch · Grande sonnerie clock watch with perpetual calendar and tourbillon
This open face pocket watch by Charles Frodsham dates to 1917 and is housed in an 18K yellow gold case measuring 75mm in diameter. Hallmarked in London with casemaker initials for Harrison Mill Frodsham, it contains a keyless, three-quarter plate movement equipped with a Nicole Nielsen type-1 three-arm one-minute tourbillon carriage and lever escapement, according to the auction cataloguer. The timepiece incorporates minute repeating, grande sonnerie striking, a perpetual calendar, and moon phase indication. Its engine-turned dial features four subsidiary dials, blued steel hands, and a signature cartouche.
Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.
The timepiece is housed in an 18K yellow gold open-face case measuring 75mm in diameter. The assembly includes a yellow gold pendant and a large round bow, with hallmarks located on the neck and ring.
The case features London hallmarks for 1917 and casemaker initials for Harrison Mill Frodsham.
The dial is described as silvered with engine-turned guilloché patterning. It features four subsidiary dials and blued steel hands.
A moon phase aperture is present within the lower subsidiary register at the 6 o'clock position.
The movement is a keyless, three-quarter plate configuration. It is a grande sonnerie clock watch featuring a minute repeater.
The technical specification includes a Nicole Nielsen type-1 three-arm one-minute tourbillon carriage with a lever escapement. The backplate is signed and bears the movement number 09649.
| Field | Source-reported value | Source quotation |
|---|---|---|
| Movement Number | 09649 | “Movement No 09649” |
| Case Material | 18K yellow gold | “Material 18K yellow gold” |
| Dimensions | 75mm Diameter | “Dimensions 75mm Diameter” |
| Casemaker Initials | HMF (Harrison Mill Frodsham) | “casemaker initials “HMF” for Harrison Mill Frodsham” |
| Tourbillon Specification | Nicole Nielsen type-1 three arm one minute tourbillon carriage with lever escapement | “Nicole Nielsen type-1 three arm one minute tourbillon carriage with lever escapement” |
| Accessories | Associated brass-bound mahogany box | “Accessories Associated brass-bound mahogany box” |
Photograph identity and source facts were screened before import; rights clearance remains pending.
Reviewed 2026-10-22 · Record d8cf79ed6f
Glossary explanations for terms named in this object’s record.
