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Horology D
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| Deadbeat |
A mechanical watch's second hand jumps from one second to the next
in a non-continuous manner --- similar to a quartz watch. Its name
comes from the fact that it can be stopped "dead", while
the watch is still running. |
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| Demi-Hunter Case |
A protective lid hinged to a watchcase to cover the
dial but with a hole in the center large enough so the time can still
be read. |
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Deployant /
Deployment Buckle |
A buckle on a watch strap that opens and closes using hinged extenders.
Invented by Louis Cartier in 1910, a deployant buckle is easier
to fasten than a normal buckle and prevents the watch from falling
off the wrist.
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| Dial |
Face of a watch |
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| Digital Display |
Time shown by using numbers instead of hands on a dial. |
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| Direct Drive |
Refers to a seconds-hand that moves forwards in little
jerks. Trotteuse, French term for a direct-drive seconds-hand, especially
a centre seconds-hand. |
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| Display Back |
A transparent back that allows the movement to be viewed;
usually made of synthetic sapphire. |
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| Doppel - Chronograph |
Refer to Split second chronograph |
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| Dual Time Watch |
A watch can display 2 time zones at the same time. |
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| Duo-Dial Watch |
Watches with faces divided into two parts; traditionally
the hour and minute hands are on top and the second hand is below. |
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