Both are true GMTs — the 24-hour hand is independent and can jump without touching local time — but each solves the adjustment differently, and the price gap between them is one of the widest in this whole guide series.
Calibre 3285, a two-tone rotating Cerachrom bezel (here, the black/green 'Sprite' variant) used to track a third time zone alongside the two shown by the hands. The GMT hand is set independently by turning the crown in the correct position, without affecting local time or the minutes.
Calibre L844.4 based on the ETA A31.L11, COSC certified. The 24-hour hand is also independent, but here the local-hour jump is done by pulling the crown itself, no extra pusher — most true GMTs on the market use a case pusher for that function instead. Fewer case openings, simpler long-term maintenance.
Many watches with 'GMT' in the name only have a fixed 24-hour hand that rotates along with local time (like the Rolex Explorer II) — useful for telling day from night, but not for tracking a genuinely active second time zone. In a true GMT, like the two in this guide, the 24h hand and local time are set completely independently.
The GMT-Master II is the segment's brand and recognition benchmark, with seven decades tied to commercial aviation. The Spirit Zulu Time offers the same genuine time-zone independence with a different setting mechanism (crown, no pusher) at a fraction of the entry cost. Neither has verified market price data in Cazador yet.