Likely the mid to late 80s, which is the range I've known most brass-lined Pioneers to come from. Could be early 90s. There are some Pioneers I have from the early 80s, without brass liners. I haven't found much of a pattern really...but others would likely have more concrete information than me.
Value depends primarily on the condition.
That's a nice looking piece though; would make a comfortable user.

"If you put Bacardi in my glass again and try to tell me it's rum, I will burn this bar to the ground!"
-A paraphrase of something I read, to which I related strongly.