RCBS used a couple of different boxes very early dies used a plain box and they went to a light green box and the last boxes they used are a dark green. I'm not exactly sure of the date but mid to late 60's should be pretty close. RCBS dies are dated either with the date or a letter code, I think I have the code dateing somewhere in my stuff. The early dies were made by Fred Huntington in CA. In my opinion the best!!!! Just my opinion, dies have always been a good value taking in the amount of machining and quality material that are used to make them.
I started buying RCBS dies in the late 60's and they were plastic boxed in 68 and 69 date marked dies. I have a light green paper boxed set of 38-40 dies that are undated that I bought used. The older die sets have an aluminum bodied decapping die in the 3 die sets and no date, maybe a letter only on the die top.
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