Temporal Hour Watch

This Japanese style "Temporal hour watch ", Mr. Masahiro Kikuno developed and built in 2011, is the first "Automatic wari-koma dial watch (Wadokei)" which has automatic index adjusting in each season.
"Temporal hour" system is the way of counting hours depends on the time of sunset and sunrise. Hours between sunrise and sunset are divided into 6 and used as one counting unit. The time of sunset and sunrise varies along the season. So this unit hour changes by season. So, in Edo era, temporal hour clock was very well designed to adjust this unstable time unit system. This "Temporal hour" watch which Mr. Kikuno made was operated under the same system amazingly into small wrist watch world. The space between index will be longer in daytime and shorter in night time on the summer solstice, while shorter in daytime and longer in night time on the winter solstice.
This watch also provided not only temporal hours hand but regular hour hands so that we can find normal time and minutes.
*wari-koma: mobile index: little plate-index slide on the rail

■Spec
Temporal Hour Watch (Wadokei)
Case: 50.0x44.0mm, thickness:16.0mm
Base movement: eta.6498-1; Manual-winding;
Hand made train-bridge; Temporal hour display
Dial: Hand-painting index
Hands: Blue steel;Golden steel (Tempered steel).
Strap: Black crocodile leather
Note: Transparent back

Not for sale