The ones my late Dad used are still in his shed,they are covered in a wooden block,I don't think they are coloured differently, his old shed is like an Aladdin's cave!
Hi mate , abit off topic , but we lost my father inlaw last year and he has 3 sheds full of handy tools and bits n pieces . Its a terrible shame they are not with us anymore and not nice to go in their sheds , but at least we can use their lifetimes worth of handy things and remember them with a little smile now and then. Oh and yes definately get that oil stone out ....I know life is very cruel,my Dads shed was his sanctuary a