Attachment 197690
Attachment 197691
Making its first appearance in the Ideal Handbook No.17 (1906), this handy little tool was last seen in the final printing (1947) of the Lyman/Ideal Handbook No.34. They are not seen very often, and are quite often mis-identified (or not identified at all) due to a total lack of markings other than being marked on the connecting link for the specific cartridge.
This one carries the stamp "30-45", indicating it was made for priming and de-priming the .30-45 Springfield headless (aka .30-1903, predecessor of the .30-'06), but works equally well for .30-'06 or .308 Winchester.
An early announcement and description of the tool appeared in the March-April 1905 issue of The Journal of the Military Service Institution:
https://books.google.com/books?id=8p...capper&f=false