Rare Strombergshyttan 3 1/2” crystal bulb vase

Strombergshyttan 3 1/2” diamond-type cut crystal flower bulb vase in excellent condition. No chips or breaks. Looks to be part of an original set that retailed for $1500+. Collection/Artist signature etched in the bottom, and it looks to be limited edition, given the vase is also labeled B971. See pics for clarification. Some pics show it as blue. It’s clear crystal but there is a slight blue tint/hue to it, so in the right light it glows blue. Man, that was a cool surprise when I took the pics!