The principal value of carriage clocks lies in their technical features. The value rises steeply in the case of clocks that incorporate striking and repeating mechanisms. The inclusion of an alarm adds value, irrespective of type. Clocks with an engraved case and masked dial command a hefty premium, doubling the value of miniatures and ordinary timepieces. An oval case adds significantly.
Calendar work on ordinary timepieces virtually doubles their value.
Porcelain or enamel paneling is the most important decorative feature. The National Association of Watch and Clock Collectors Inc. is a scientific and educational corporation founded in 1943 to bring together people who are interested in timekeeping in any form. They have chapter meetings all over the place where you can ask questions and learn. There are three super places here in Connecticut.