14 ga. western expert

i recently picked up some aluminum cased 14 ga. western shotshells. my question is because these shells were made for the experimental winchester mod. 59 14 ga. in 1960 would they be considered collectors item’s or just good conversation pieces

Welcome to the IAA forum
Yes they are collectors items, some of the many variations are uncommon & some relatively common trading for only a couple of dollars. Winchester also branded these shells. A good collection I should think might have 40-50 & more variations, counting both brands. Also they might be marked 14 ga but are 20 ga with a thick rim,
Hope this is of help.