3 1/8" X 4 3/8" (78mm X 107mm)

 (front skirt) BULLERS LTD / LONDON

(rear skirt) GCR                                      

{Bullers}

Picture courtesy Gene Kingsley

3" X 4 3/8" (74mm X 107mm)

 (skirt) BULLER, JOBSON & Co. LIMITED

DUDLEY ENGLAND              

{Bullers}

Picture courtesy Bob Berry