Love Stamp
From Muppet Wiki
Jim Henson and Rowlf with a sheet of Love Stamps, 1986
On Valentine's Day 1986, the US Postal Service's annual "Love" postage stamp featured a drawing of a puppy.
Jim Henson and Rowlf did promotional work for the stamp's launch, and a drawing of Rowlf was featured on the collectible First Day cover, issued January 30th, 1986. Guy Gilchrist, who drew the Jim Henson's Muppets Comic Strip, did the art for the First Day cover.
