ChronoTheory & Co caliber 6498-1 CT EDITION

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Brand:ChronoTheory & Co
Reference:6498-1 CT EDITION
Movement:Handwound
Display:Analog
Diameter:36.60
Jewels:17
Reserve:46
Frequency:18000
Hands:Hours, Minutes, Small Seconds
ChronoTheory & Co caliber 6498-1 CT EDITION

6498-1 CT EDITION description

The ETA 6498-1 CT Edition is a hand-wound mechanical movement based on the proven Unitas 6498-1 architecture, modified and hand-finished by watchmaker Yutaro Iizuka for CHRONOTHEORY&Co. This customized version retains the traditional 18,000 vibrations per hour (2.5 Hz) beat rate and manual winding system, offering a power reserve of approximately 46 hours.

Distinguishing features include hand-filed bridge chamfers with return angles, mirror-polished surfaces, and a proprietary semicircular Côtes de Genève decoration—claimed to be the first of its kind in Japan—applied using a wooden rotary tool. The bridges and baseplate are plated with 24K gold, lending the movement a deep, saturated tone. Additional refinements include polished screw sinks, gears finished to the tooth tips, and a Triovis regulator for fine adjustment. The movement is equipped with 17 jewels.

All watches using the ChronoTheory & Co 6498-1 CT EDITION movement:

ChronoTheory & Co AV-98 Piano Forte Black (CTW-027-Black)

CTW-027-Black ChronoTheory & Co AV-98 Piano Forte Black
ChronoTheory & Co AV-98 Strato Navy (CTW-027-Blue)

CTW-027-Blue ChronoTheory & Co AV-98 Strato Navy
ChronoTheory & Co AV-98 Timpani Rose (CTW-027-Rose)

CTW-027-Rose ChronoTheory & Co AV-98 Timpani Rose