Picked Up Another Nice Smoke for the Collection, AN M8

[J.Q.M.D.]

I'm setting up at the big New Years show in Louisville, and always get there early to look around for a bit.  I managed to find this perfect condition live AN M8 Smoke Grenade and canister on a table for $40.  Of course I had to snatch it up!  Now I have two violet M18s, an M83, and this AN M8 in my collection. What era would this one be from?  There are no dates or lot numbers on the tape.  I'm guessing Vietnam era? 

[917601]

They were made up to 1990

[Inertord]

The lot number was originally applied to the top of that type can in white paint, someone probably removed.