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The Grumpy Old Man
.:.::. .:.:..:.

August 2015
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The Grumpy Old Man [userpic]
I'll take a slice!

Mars Bars used to be 2½d, back when we wore onions on our belts.


2 1/2d? What is this D unit it's using?

d = pennies in the pre-decimal British monetary system, from the Latin denarii.

Huh, no kidding. I always just heard people say "P" and so forth.

That's "new pence" but everyone says "p". The d is "old pence". One pound was divided into 20 shillings, and 1 shilling was 12 pence. Confused the hell out of tourists. So they changed shillings to 0.05 pounds, eliminating the name 'shilling', and converted d to 5/12p (or, easier, 1p = 2.4d).

Confused the hell out of tourists.

And, more pressingly, computers.

1p = 2.4d

Of course, the 1970s being the decade of silly-level inflation, the new penny didn't stay more valuable than the old penny for very long. The ½p coin, or "tiddler", lasted about eleven years before being demonetised as basically worthless. (I've still got a few lurking around somewhere.)