Western style d6. 5 pips on each side. Why? Where did it come from?

cross-posted from: https://lemmy.dbzer0.com/post/52934932

I know WHAT it is, but I dont know why it exists, what use it has, or where it may have come from. All sides are identical, its translucent green. The pips are scalloped, not painted on, and are otherwise unremarkable. Help me out here, its definitely my favorite d6, but I am struggling to figure out a purpose for a +5 dice.

...I mean, aside from that I need a +5 weapon, clearly.