DONT PANIC.
I just got mine. Mine is a 38mm and the back is like yours. I thought it was weird too but I bought it at Saks so I know its real. My friend bought one at the same time and hers was different. S/N was in the center. There is obviously a variation or a change has been made.
PIC:
I just got mine. Mine is a 38mm and the back is like yours. I thought it was weird too but I bought it at Saks so I know its real. My friend bought one at the same time and hers was different. S/N was in the center. There is obviously a variation or a change has been made.
PIC: