L'Aviateur - L'Oiseau-Tonnerre

The Thunderbird 8N24 automatic is a 3-hand self-winding skeleton watch — no chronograph. The Thunderbird 0S00 quartz is a chronograph with stopwatch sub-dials. Both share the same case, sapphire crystal, and 100m WR.

No. The Thunderbird Miyota 8N24 automatic is a 3-hand watch — hours, minutes, and seconds only. It does not have a chronograph or stopwatch complication. The skeleton dial exposes the automatic movement's mechanics. Only the Thunderbird 0S00 quartz has a chronograph function with pushers and sub-dials for elapsed time tracking.

The Thunderbird 0S00 quartz chronograph features a stopwatch function operated by two pushers. The upper pusher at 2 o'clock starts and stops the elapsed seconds hand. The lower pusher at 4 o'clock resets. Sub-dials track cumulative elapsed minutes and hours. On a pilot watch, this is used to calculate approach time, fuel burn intervals, or holding pattern duration.

The Thunderbird skeleton is automatic, powered by the Miyota 8N24 self-winding movement. The open-worked skeleton dial exposes the movement's gears, bridges, and balance wheel. It requires no battery and winds itself from wrist motion. The skeleton configuration is not available in quartz — the open-worked dial design is exclusive to the automatic variant.

Choose the Thunderbird 8N24 automatic skeleton if you want a mechanical watch with visible movement and no need for a stopwatch function. Choose the Thunderbird 0S00 quartz chronograph if you need elapsed time tracking via pushers and sub-dials, and prefer the low-maintenance precision of quartz. Both are built to the same standard: sapphire crystal, PVD steel, 100m water resistance, free shipping.