Not my mailbox, picture from internet. Have seen many like it driving around.Does that present any problem as far as opening or closing the door. I can sort of envision the mail carrier trying to pull the door and the whole box swings towards them.
I used to work quite a bit in Ayer area and I do believe I may have seen your mailbox as it is unique. Is it on the road with the initials S.... P.... Rd?