Dad gave me Grandpa’s old Zippo

I mentioned to my Dad before Christmas that a neat gift would be a zippo. The other morning he came up from the basement and handed me this. My Grandpa passed before I was born, but he worked for Iroquois gas for a while. I’d had their logo in enamel, and possibly an emerald?? The back of the box says “10 year, Jewel” which lead us to the conclusion that this was a ten year employment gift from the company. We believe it is from 1971. I’m sure many of you have posted some neat finds on here, but I’m new to this and wanted to share!! If anyone happens to have any other details about this zippo, we’d love to hear em.