Mean rate 5 ±5 s/day, max. divergence 20 s/day, 3 positions (CH, 6H, 9H); isochronism ±15 s/day; nickel gilt balance
Top
0 / +8 s/day
Mean rate 4 ±4 s/day, max. divergence 15 s/day, 5 positions; isochronism ±10 s/day; Glucydur gilt balance
Chronomètre
-4 / +6 s/day
COSC criteria
Hand-wound version of the SW532, the SW500-family cam-operated chronograph with a second time zone. Sellita technical documentation (version 01, 13.02.2024): case fitting Ø30.00mm (13¼ lignes), overall Ø30.40mm, 7.50mm high (the automatic SW532 is 8.40mm), 21 jewels, 28,800 vph, power reserve minimum 58h / typical 63h, lift angle 50°, Incabloc, Nivatronic collet, stop-second, fine timing device. Displays: hours and minutes in the centre, small seconds at 9, centre 60-second chronograph hand, 30-minute and 12-hour counters, date window with quick setting, and a centre 12-hour GMT hand (it can show half-hour time zones) linked to a day/night disc. Pushers at 2 (start/stop) and 4 (reset); crown positions: winding, quick-set of date and GMT, time setting. The 2026-2027 catalogue lists the executions by where the day/night disc sits (automatic SW532: a = 3 o'clock, b = 12, c = 9, d = 6; 30-minute counter at 12, 12-hour counter at 6).
echo/neutra 1956 Chrono GMT