Le 02/10/2011 07:57, mike cook a écrit :
The clock was made in 1854, though not installed and started in the
tower until 1859. In those days the penny was 18,8 grams, twice that
of the 1860 and latter pennies.
So I wonder which ones are currently in use? If the penny story is
true I would have thought that pennys available at the time of testing
and installation would still be there. The halfpenny of the 1825-1860
period was 9,3 grammes, so maybe the original weights were halfpenny's
and later swapped with 9.4g penny's.
Just located an article from Reuters dated November 2009,
150-year old pennies removed from London's Big Ben
...
Three of the 10 coins have now been replaced with a 5 pound crown --
produced as part of the Royal Mint's collection to celebrate the London
2012 Olympics -- which features Big Ben's clock face.
But McCann will keep hold of the old pennies in case they need to be
returned to the pendulum at a future date."
So if Reuters can be believed, the penny's date from the time that the
clock was installed and are thus the 18,8g issue.
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