Some specifications for this reference are on file; the record is incomplete.
Arnold & Son · Instrument
Time Pyramid
Ref. Time Pyramid
Missing informationCore fields not yet documented for this reference: Case diameter, Caliber, Production, Water resistance, Dial
Authentication Notes
Movement
The layout is the identification and it is fully exposed
A skeletonised watch built around a specific movement architecture cannot conceal a substituted caliber, because the architecture is what the buyer is looking at. Compare the arrangement — barrel positions, train layout, balance position, bridge shapes — against the published caliber. Any generic movement placed behind this dial would be immediately visible as the wrong shape.
Inspection points
No inspection checklist has been published for this reference.