4 Wheel, A-Z Padlock
By Ber-Don Incorporating Clock indicating the time at which it
is secured. Invented by A. Donovan 1921.
lock was used extensively between 1920 and 1950 for the purpose
of securing the bag containing betting money that the on course
bookies would have taken between races.
It was the bookmakers responsibility to close the shackle just
before the start of a race. This action stopped the clock and
was proof for the race course officials that no bets had been
taken once the race had commenced. The changeable combination
was known only to the official who would open the lock during
the duration of the race. The clock mechanism is shielded so that
a magnet cannot be used to alter the timer.