Mathematically fascinating (not to mention a mite confusing) in that these dark chocolate bars had five fruit-flavoured creme centres (orange, lemon, lime, raspberry and pineapple) but seven segments per bar.
You could work out which segments would have two flavours in and which wouldn’t (if you were very sad), and it was always a bit annoying if a flavour you liked got mixed with one you didn’t.
Fry’s 5 Centres was first produced in 1934 and discontinued in 1992.