In Reply to: The Dog's Bollocks posted by Gary Martin on August 13, 2008 at 07:26:
: : Regarding 'The Dog's Bollocks'...
: : An episode of QI on British television stated that the origin of this phrase has to do with the children's toy- Meccano.
: : In its early days, it apparently could be bought in boxed sets of two sizes:
: : Box Deluxe, and Box Standard.
: : These thus have given us the terms 'The dog's bollocks' (something excellent), and 'bog standard' (something of bland normality).
: : Is there any solid evidence for this?
: No evidence. It's pure invention. See https://www.phrases.org.uk/meanings/dog's%20bollocks.html
Also, Meccanno sets were designated by numbers and letters See: https://www.phrases.org.uk/bulletin_board/43/messages/1020.html