45 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.
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The all mirror-polished finish across case, bracelet, and dial is unique to this specific Defy Extreme reference; any brushed or matte surface is inconsistent with it.
Known issues in the market
This is the only Defy Extreme finished entirely in mirror-polish; a mix of brushed and polished surfaces indicates a different Defy Extreme reference, not the Mirror.
The El Primero 9004’s second, chronograph-dedicated 50Hz escapement is a genuine differentiator from lower-tier Zenith chronograph calibers; confirm the dual-regulator architecture rather than assuming any El Primero movement qualifies.
Area
What to check
What is correct
Red flag
case
All mirror-polish finish
Fully polished stainless steel case, dodecagonal bezel, crown guards, and integrated bracelet with no brushed or satin surfaces anywhere
Any brushed or satin-finished surface on case or bracelet; mismatched bracelet finish relative to the case
dial
Mirror-tinted openworked dial
Openworked dial with a mirror-finished central sapphire element, three snailed sub-dials in silver with black markings, applied rhodium-plated indices
Opaque or colored sub-dial backgrounds inconsistent with the mirror-tinted sapphire treatment
movement
El Primero 9004 dual-escapement architecture
Two distinct balance wheels/escapements visible through the open dial and caseback (5Hz timekeeping, 50Hz chronograph), Time Lab chronometer certification
Single-escapement movement; missing second balance wheel; absence of chronometer certification marking
Common legitimate replacements
Original mirror-polished steel bracelet; black rubber strap and hook-and-loop strap are authorized factory alternates for this reference.
