Mean rate 7 ±7 s/day, max. divergence 20 s/day, 3 positions (CH, 6H, 9H); isochronism ±15 s/day. Novodiac shock protection. Often marketed as "Special".
Top
0 / +8 s/day
Mean rate 4 ±4 s/day, max. divergence 15 s/day, 5 positions; isochronism ±10 s/day. Incabloc shock protection. Often marketed as "Premium".
Chronomètre
-4 / +6 s/day
COSC criteria. Incabloc shock protection.
Automatic moon-phase caliber from Sellita's SW200 family: an SW200-1 base with an instantaneous date and moon-phase indication, both shown in apertures and quick-set through the second crown position (three stem positions: winding, date and moon-phase correction, time setting). Sellita technical documentation (version 01, 07.02.2020): case fitting Ø25.60mm (11½ lignes; overall Ø26.00mm), 5.65mm high, 26 jewels, 28,800 vph, 38h running time, lift angle 50°, stop-second, fine timing device, Nivaflex mainspring, oscillating weight on a ball bearing. Caliber Corner lists 4.6mm high (the SW200-1 base figure); Sellita's 5.65mm is recorded. Caliber Corner gives two factory layouts: "SW288-1 a" with the moon phase at 12 and the date at 6, and "SW288-1 b" with the moon phase at 6 and the date at 3. In production since 2018 per Grail Watch; ETA has no direct equivalent. The SW288-1 M is a separate hand-wound version (not this file). Grade accuracies are given as ranges from Sellita's mean-rate figures, as in the SW200-1 file. sellita.ch was in maintenance on 2026-10-21, so the documentation was read from the copy hosted by Cousins UK.
Zelos Aurora Moonphase