They look mid 60's, into the 70's. The Red Dot container looks a little earlier than the other two, but maybe I just don't recall buying RD in one.

We used to buy alot of shotgun powder in bulk then. A local hardware store was the place to buy. You brought in what container you wanted,,most generally a coffee can w/the tight fitting steel lid (Maxwell House!).


Zip codes started in the early 60's (62/63) but I don't think they were manditory on all mail till later on.