My grandmothers Pinking Shears

Today I stumbled across my grandmothers pinking shears. They have a 15 year gaurantee inside the box, but I'm pretty sure they are older than that. I'm guessing they are at least 50 years old, possibly older yet.

I honestly don't think I've ever used them. Oddly enough they have been packed away in my Valentine's Day decorations for who knows how long. I'll have to put them to work!