Care to guess which is my favorite on here? One has nice olive green amber that goes from the center in the front to the back side where it becomes much more intense. Not sure that one is a Denver mold being it has a dome number. The bubblely fizzy one I'm pretty sure is. The remaining insulator (ipictured in the middle) has an embossing error. The period is underneath the o of Co. Not sure if that would be considered a variation. Not what I would say anyhow. I plan to post a close-up in the Embossing Error Album. Anybody else have one of these. This one is an 080 with a #5 crown number only.