4 1/2" X 5" (114mm X 127mm)

(crown incuse front)         

(crown incuse back)        P-5664

{Made by Bullers in England, found in New Zealand}

Picture courtesy Bob Scafe

4 5/8" X 5 1/2" (117mm X 135mm)

(crown incuse front)         

(crown incuse back)        P-5034

{Bullers}

Picture courtesy Russ Firth

4 5/8" X 5 1/4" (116mm X 130mm)

(top skirt inkstamp)  

                               6M78

{Allied Insulators}

Picture courtesy Bob Berry