An excerpt from "The Rose Of Dundee," an article on the internet, so this is not my assertion which might need verification:
"Cork Silver prior to 1730- The earliest making was a traditional craft in a settled society. The earliest surviving silver items of Cork origin are ecclesiastical, and were made for, and presented by pious donors who usually inscribed their names upon the items. Amongst these is the ‘Alsona Miaghe’ chalice presented to the Catholic Church by a member of the Meade family in 1598. This chalice is particularly interesting as it bears upon its stem a punch in the form of opposed ‘c’s’, which is possibly the earliest known Cork maker’s mark."
Now here is the spoon that I found along with another spoon from Cork (see above post the "I pellet W" mark) :
I often jump to absurd conclusions, but could it be possible that the "CS" mark here is the same "punch in the form of opposed 'c's' , which is possibly the earliest known Cork maker's mark" or am have I simply jumped to another absurd conclusion?