1920s Set of 4 UNBREAKABLE STEEL CENTRE Knitting Pins 7" Gauge 13 Made in England

A delightful little paper envelope containing a set of 4 Knitting Pins with
" a hardened and tempered steel centre, which makes them UNBREAKABLE. They are uniform in gauge and a perfect surface"
Which makes one wonder what knitting needles were like before these little marvels were invented !
They are 7" long - gauge 13.

Made by "Double Century" Established in 1698.
The first picture shows the original box they come in.
Most of the little packets are sealed, a couple are split at the end - I've made these a bit cheaper.