There are many replica post boxes, ranging from simplistic copies to accurate reproductions. It is not always clear whether a postbox is an original or not.
Birb box; this seems to be a hybrid of the Hovis and waggon top lamp boxes, both of which predated Elizabeth IIA poor copy of the 1940 pattern lamp box (the collection plate holder is far too small)Some sort of wall box
1977 pattern EIIR lamp box; note the hex bolts securing the front cover instead of the rivets used on real lamp boxes1977 pattern GVIR lamp box, which is convincing but this design did not exist in George VI’s time; this too uses hex bolts instead of rivetsAnother 1977 pattern, this time claimed by Black Country Metal Works to be the Scottish crown, but it is not, and they are keeping quiet on why the design appears to be something they inventedThis is not the Scottish crownGVIR waggon top lamp box; various details are not exact (including the design of the door), but it’s a reasonable effortW T Allen EIIR wall box; this one is a mystery as it is so accurateThere is nothing to suggest that this is anything except genuine or a perfect copy