I have the 224. Nice watch. Caseback and dial are very nice. Crown guard lever is loose/wobbly and not very tight. The polish on the case is impressive - very high shine, mirror polish. The engravings for the tachymeter bezel are shallow and the paint started coming off after a couple of weeks. The strap is quality. The clasp is not very good. The "new" A7753 is very good (for a Chinese chrono movement). Keeps very good time and chrono functions work well. B+ overall.
