Mars - M&M's Peanut - Star Trek Action Fleet mail-away offer - candy package - 1980
Surprisingly, I've never come across another wrapper with this offer before.
Featured in the post: M&M/Mars' 1980 Star Trek Action Fleet! www.collectingcandy.com/wordpress/?p=7523
This piece comes from the L.M. Kallok Collection - a collection of vintage confectionery packaging, originally saved between 1975 and 1999.