Maker unknown, Italy. Iron Chamber Clock, late 1400's. 12 1/2"h x 5 1/2"w x 6"d. Foliot
escapement, stirrup winding ratchet, count wheel featuring alle Romana and la
ribatta strike. 12 hour duration. Bell, dial, hand, hand motion work, weights,
bracket later replacements.
The second photo shows a repair or perhaps an adjustment to the strike
fly where additional material was riveted to the original blades.
Depicted above are two additional repairs, both being on the main wheels
of the time and strike trains. In the first photo the mounting plate where
the stirrup click is mounted has been replaced. The time train wheel next to
it on the left has the original wrought iron disk. This wheel has had its
spokes repaired by laminating a set of four brass strips riveted to the
original spokes in place. The reason this was done is that over the years
the stirrup click rubbing over that section of the spoke had worn them down
to an dangerously thin profile. The strike train main wheel shows a similar
wear profile but not to the same degree.
The stirrup click is one of the earliest types used in clockwork and this
type of wear was not uncommon until the advent of the ratchet click and
spring system which is still in use today.