Thanks to Stuart Burgess & Gordon Leel]I'm going for a ruby.
And Paul offers a somewhat disturbing image: In the times of Nelsons navy paper was too expensive to use in the head (toilet) and so sailors would get a short length of rope (toe) and unravel it until it resemble rags (toe-rag), this would then be used instead of paper and had the added benefit that t could be washed and re-used.]I've just gotta go down the Steve for some petrol [Thanks to Jon Simmons.
Before 1919 it is doubtful whether anyone in the country let alone cockneys would have heard of it.
In Mayhew's London Labour and the London Poor (vol 3 1851) there is a chapter on Punch Talk (basically the slang language used by traveling Italian Punch and Judy men and entertainers).
Steve Claridge is a venerable striker, late of Leicester.]He's a bit Ted. This association actually comes from a particularly bad movie "My Wife's Family" where he played a character called Jack Gay. [Actually pronounced 'Scarper' - just one example of not being satisfied with the slang, they then mispronounce the word to thoroughly confuse everyone.
Robert Benoist sent me the following which I found interesting: Scapa Floe was a Royal Naval base established in the 20th Century and famous for the scuttling of the German fleet in 1919 and a subsequent WW11 battle.