Haven't been able to find this exact one but here's a similar one from
http://zippogallery.com/Personalities.htm with a picture and brief description below:
"Rare Zippo with the image of Martin Luther King Jr. and "I have a Dream". It has the original price sticker for $6.00. The Zippo is dated 1974, six years following the assassination of of the civil rights leader in 1968 who has since become an icon of human rights."
Thanks ,it must be pretty rare ,I found two that had sold on Ebay like the one you posted for $72.00 and one sold for $150.00
I can not seem to find any info on my lighter