Very useful for holding that vintage hair do in place.
Or so I've been told buy some very excited ladies at Vintage Fairs I've taken these to.
20 of then come in their original paper roll.
They are 4.5cm long, black and thin but strong - more suitable for fine hair....
On the original boxes are labels showing these were made in Germany by Prym.
These could be earlier than 1940s - I found them in an old warehouse clearance.