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This model is the Dibro Child's Cashbox Money Box in Black and Gold. The item is tinplate and has a locking mechanism.
The model has a two-piece, pressed metal body, 78mm in width, 54mm in depth and 43mm in height at is extremities. It has been shaped to accurately represent the full size cashboxes used in so many small businesses and homes at that time. At the front there is a key hole that leads to the simple locking mechanism (that any child worth its salt could easily pick). The lower sides are unadorned and plain black in colour. The top is decorated like the real cashbox with gold and red trim, a plain handle, riveted to the top, a rear hinge arrangement and a slot to put the coins through in the area between the handle arms. Along the rear edge of the top is printed "C.B.I." in red lettering to the left, followed by the DiBro REG'D trademark in red and gold. To the right is the legend "Made in England" in red lettering.
To my delight, once I had picked the lock, I discovered this item contained not just some modern small coins, but several commemorative coins (Charles & Diana Wedding 1981, a 1953 Coronation 5 Shilling piece, a 1977 25th Jubilee Commemorative piece, and a Bailiwick of Jersey 25 pence coin commemorating the 1953-1977 reign of Elizabeth II) plus a variety of UK half crowns (1947-1949), shillings (1950 George VI to 1964 Elizabeth II) and sixpences dating from 1947 to 1967.
I do not know exactly when this item was originally issued but believe it to be between 1945 and 1965.