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The Encyclopedia of Horology

Glossary · Mechanism

Maltese cross

The cross-shaped stopwork finger seen on high-grade Geneva barrels.

Explanation

The Maltese cross, or Geneva stopwork, limits the part of the mainspring's winding range that the watch uses. A finger on the barrel or fusee engages a cross-shaped stop so the spring is not taken into its strongest or weakest turns. The aim is steadier force, not absolute constant torque.

The device must be correctly phased. If it is assembled out of position, worn, missing its finger, or bypassed during repair, the watch may wind or run through a range the designer intended to exclude. The cross shape also became Vacheron Constantin's emblem, but that logo use should not be confused with proof that a particular movement contains the mechanism.

Sources & references

  1. Gazeley, W. J., Clock and Watch Escapements — mainspring control
  2. Britten, F. J., Watch & Clock Makers' Handbook — Geneva stopwork terminology

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

What to record

  • Identify whether the stopwork is on a barrel, fusee or absent.
  • Record missing, disabled or mis-phased parts as condition evidence.
  • Keep logo history separate from mechanical construction.

Stopwork is connected with stored mainspring energy; do not release or reposition it casually.

In the object catalogue

Catalogued objects whose own source record mentions “Maltese cross”. The quoted line shows where; it is the seller’s or museum’s wording, not independent verification.