ltgemWeb research indicates that the crown is push/pull not screw down. Also the back is held down with 4 screws, not a screw in back. Probably why so thin. There are additional color choices on the web with most sites selling for $535.00 (no extra bands). Also versions with all stainless steel band for $$585.00 and a rose tone case/band combo that I havent gotten any info on as of yet. Want to know what the rose gold color(brown dial) is? Plated, ion plating etc.