SPECIFICATIONS
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Cal. 8T63A
Cal. 8T63A has a new structure employing one crown and two buttons. The construction of chronograph
mechanism is based on Cal. 8R28 mechanical chronograph watch by using the one-piece 3 pointed reset
hammer. While other Swiss-made watches are using separate hammers which require an assembly and
adjustment of the hammers, the one-piece hammer design realizes maximum durability and stability of
the component and easier maintenance. It is also equipped with the self-alignment function for all counting
hands to return to zero positions instantaneously.
The design of the multi-display analogue Cal.8T63 is based on Cal.6T63. It features the same
stopwatch function, but has higher accuracy and an energy depletion forwarding function.
●The time is indicated by the 24-hour, hour and minute hands, and a small second hand.
●The stop watch can measure up to 60 minutes in one second increments. After 60 minutes,
it will stop automatically.
●Measurement performance
Displays the elapsed time with the 2 designated STOPWATCH hands.
Measures up to 60 minutes in one second increments.
●Button operation (Crown position: Normal position)
Button A: START/STOP
Button B: RESET
1. STOPWATCH FUNCTION
Cal. 8T63A
a b c
Hour hand
Minute hand
STOPWATCH 1/5-second hand
STOPWATCH minute
hand
Small second hand
a: Normal position
b: First click
c: Second click
24-hour hand
A
B
CROWN
When pushing the reset button
the HAMMER OPERATING LEVER
B moves automatically to
keep appropriate balance of the
HAMMER position.
CHRONOGRAPH
COUPLING LEVER
HAMMER OPERATING
LEVER A
HAMMER OPERATING
LEVER B
HAMMER HAMMER HAMMER OPERATING
LEVER B
FEATURES
START RESET
