After 60+ years those elastic bands are no longer elastic, so it has to be replaced.
I found some elastic band 15 mm wide that is near the original 5/8" material. It is white, but I tinted it with sepia ink, and that matches the original colour.
I made up a small quantity, so if anybody is interested: for 1,50 Euro or GBP 1 I'll send you sufficient band for two goggles, with instructions
Hey Hans, I'll have one if possible, mine went west during convoy duty on Saturday.
Cheers, Mick
PS any one got a source for the grey leather used each end of the strap?