I've been looking to buy some old silk fly lines....Just want to experience how they cast, but it's really hard to find any information on brands and such from back then.

I've been looking on ebay and found a fly line that looks to be new, old stock...still in original package and looks unused. But I can't see on the package if it is silk or not....It's a Gladding's Ideal fly line.

Does anybody have any place I can look up old lines? Websites would be the best, but if a book is available I'd get that too.

Thanks in advance

Black Co.