Well... to me, This looks like some of the newer ones. typical 1990's
Usually...the older beads show more ware around the Perf's and the surface is usually smoother.
I really don't think there are enough photos to make a good guess.
Photos....I use photoshop. make the size no more then 160kb. I think that's the right size for BCN.
More photos....show more beads too.