Glossary · Mechanism
Winding square
The squared end of the barrel or setting arbor that a key or stem engages to wind or set a watch.
Explanation
The winding square is the squared end of the barrel (or fusee) arbor onto which the key fits in key-wound watches and clocks. Squares vary in size, which is why key gauges and sets of keys exist; a loose key rounds the square. Rounded squares are common on old watches and can be re-cut by a watchmaker.
In the object catalogue
Catalogued objects whose own source record mentions “Winding square”. The quoted line shows where; it is the seller’s or museum’s wording, not independent verification.
Movement
English fusee detached lever pocket watch movement by John Harrison, Liverpool
“Winding square projecting through the upper plate”
Clock
Sessions Grand Assortment #3 gingerbread clock
“This Sessions Grand Assortment #3 is an American gingerbread or kitchen clock dating to circa 1915 according to source historical notes. The steam-pressed oak case stands 22 inc…”
Clock
Vincenti & Cie French mantel clock
“This French mantel clock is cataloged by Stockholms Auktionsverk Köln as dating from the mid-19th century and featuring a movement stamped 'Vincenti & Cie, Médaille d'Argent'. R…”
Clock
Johann Baptist Beha “Harrenhäusle” Cuckoo Clock
“Large white circular dial with black Roman hour numerals and two winding squares.”
Clock
Louis-Achille Brocot mantel clock with two-wheel escapement
“Dial signed 'BROCOT BREVETÉ' below the twin winding squares”
Pocket watch
Silver Chinese Market Duplex pocket watch
“Freestanding barrel bridge with an open winding square”