Vintage Razor Blades and Wrappers

I came across this collection of vintage razor blades in wrappers. They are mostly Swedish and I would guess they are mainly from the 1930s, 1940s and 1950s.

The hobby of collecting these I know nothing about, however I can imagine it was pretty popular once upon a time. Being an affordable household item with varying and often elaborate design it must have been much like collecting matchboxes/books, bottle caps or cheap stamps.

If anyone has information on the subject or can point to a place of information, let us know.

Vintage Razor Blades and Wrappers