Age of paper shotshells (UK, US and German)

I acquired a box of around 25 various paper shotshells. There were six different types in there in varying quantites. How old are these shells? All are 12 Gauge. I don’t know a lot about shotshells, but I seem to remember some similar Eley shells which dated from the 1970s. Thanks for any info.

the ICI shells could be from the 30’s to the late 60’s but are most likely the later. The Eley-Kynoch 12 from the 70’s to recently (not sure when the switch from paper to plastic took place [late 80’s to mid 90’s? with some lines still being paper] but plastic is also known headstamped like that) & the Westley’s is from the late 1980’s early 90’s- I think that’s when those appeared.
The Western I think from the 40’s to the 70’s (probably 1950’s for that one) & no idea about the German other than a wild guess being 1930’s to the 70’s & it looks like a brass washed steel head.

All these dates are from the top of my head, so should be taken with a grain or two of salt

Thanks for the reply Pete.