Question Shimmer material from fifties and sixties

[D Brugge]

Way back in the 1950's and 1960's there was a product that was very popular in the industry. It consisted of a plastic or nylon grid of pegs spaced about two inches apart that held circular metallic disks about an inch and a half across. I am just guessing at the dimensions because as a kid, I saw these on signs everywhere but I never examined the them up close.
The effect was that as the wind blew, the disks would move back and forth on the pegs and give the sign a metallic shimmering effect.
Can anyone tell me what the product was and is there anything available similar?

 

[T_K]

I've seen those on the back of Sparkletts delivery trucks. No clue what it's called though.

 

[Rick]

They are called shimmer signs...

Newman’s Displays

 

[Billct2]

I remember them being used when I first started and they were called Reflecto Disks. there was an article about the process being revived. here is a place in the US that has them.
Flitter Signs - refelcto-lite.com :: Portfolio

 

[Billct2]

I think this was the company I remembered SolaRay® | Sequin Signs - Radiant Manufacturing