Clock type · Specialist

Skeleton Clocks

Verified

Clocks with the front (and often rear) plates cut away and pierced so that the wheel train, escapement and striking work are visible, typically displayed under a glass dome.

Construction and interpretation

Skeleton construction makes the mechanism visible by opening or reshaping the supporting frames and reducing the dial’s obstruction. It is a presentation and structural choice, not an escapement type. A clock may combine an open frame with a fusee, going barrel or another power arrangement. Great-wheel and architectural designs display different aspects of the train. Visible wheels alone do not establish that an object was originally made as a skeleton rather than altered later.

A passing strike normally gives a single blow as the hour passes; a full striking train counts the hour, while chiming work adds a further function. Identify these separately instead of describing every exposed hammer as an hour-counting mechanism. Completeness includes the dial ring, hands, feet, base and protective cover as well as wheels. A replacement dome can provide useful protection without being an original component. Its history should be recorded without turning visual similarity into proof of original association.

Skeleton Clocks: feature and evidence comparison
Feature	What it means	Evidence to seek
Open frame	Shows supporting structure and wheels	Original frame finish and construction
Fusee or barrel	Different power-transmission arrangements	Chain and barrel views
Passing strike	Single hour signal	Source-described release mechanism
Full strike or chime	Counting or musical function	Separate trains and hammers

Dust, polished surfaces and exposed pivots need conservation-led care; do not clean the mechanism with household products.

Evidence to record

Describe exposed structure without assuming a particular escapement.
Distinguish a protective cover from a known original dome.
Record the functions of visible trains individually.

Movement & mechanism

Pierced, fretted brass plates replacing the solid plates of a conventional movement
Fusee or going-barrel spring drive; some larger examples are weight-driven
Passing-strike or full striking trains are common in higher-grade examples, deliberately left visible

Identification

Fretted, decoratively pierced plates are the defining visual feature
Glass dome, when original, protects the exposed mechanism from dust
Architectural case designs (e.g. modelled on cathedral tracery) are common in English work

Terminology

Fret — the pierced, decorative openwork cut into the plates
Passing strike — a single blow struck each hour as the hand passes, as distinct from a full count strike

Known variations

Architectural skeleton clock
Passing-strike skeleton clock
Full-striking/chiming skeleton clock

Collecting notes

Skeleton clocks are collected primarily for the quality and intricacy of the piercing and for maker attribution; the glass dome, if original and undamaged, materially affects completeness and value.

English Skeleton Clock by Smith & Sons — Rauantiques, CC BY-SA 4.0. Wikimedia Commons file page

Great Wheel Skeleton Clock — English Skeleton Clock by Smith & Sons — Rauantiques, CC BY-SA 4.0. Wikimedia Commons file page

Sources & references

Britten, F. J., Old Clocks and Watches and Their Makers
https://en.wikipedia.org/wiki/Skeleton_clock

Where sources disagree, the disagreement is stated rather than resolved silently.