Armin Strom ARR18, Owner'S Manual

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Do not try to wind the watch or set the
time during a chime. A specially develo-
ped security system maximizes ease-
of-use by protecting the minute repeater
mechanism from accidental damage by
blocking operations during time-setting
and winding.
SUSTAINING A CONSISTENT RESONANCE STATE:
A SOLUTION TO THE 200-YEAR OLD PROBLEM
Resonance watches are so rare precisely
because they are so extraordinarily dif-
ficult to design and produce, as they es-
sentially require two watch movements
to be combined into one unit that utilizes
two independent mainsprings, gear
trains, escapements, and balances. A re-
sonance watch requires its two balance
wheels find a concurrent rhythm so as
to continuously regulate one another. The
follow-on challenge is to consistently maintain oscillation-rate stability; in order
to enlist the resonance phenomenon to
the cause of chronometric precision. This
challenge has historically eluded even the
greatest of watchmakers, as the fragility
of the phenomenon makes it extraordina-
rily difficult to consistently maintain with
resiliency to disruption; particularly in the
context of a human wrist that is both con-
tinously engaged in unpredictable motion
and which often ‚bumps into things‘.