Original padded 5x9.75" envelope has Feb. 7, 1975 postmark date with "Hallmark M.S. Inc." return address. 3" tear at flap, VG/Fine. Included within is 7.25x9.5" tri-fold order form that advertises Star Trek, Janice Joplin/Jimi Hendrix and Marvel Superheroes medallion coins. "Special Offer Made Exclusively To Hallmark Superhero Coin Collectors." Could be ordered as medallions or coins and in gold, silver or bronze. Included is complete set of three 1.5" dia. bronze coins depicting The Incredible Hulk, Spider-Man and Conan The Barbarian. ©Marvel Comics Group 1973-1974. Hulk coin reads "The Incredible Hulk--The World's Strongest Mortal" and shows him punching through wall, reverse shows transformation scene showing Bruce Banner transforming into The Hulk and reads "Within Each Of Us, Ofttimes, There Dwells A Mighty Raging Fury" with "The Incredible Hulk First Appeared May, 1962." Spider-Man coin reads "Your Friendly Neighborhood Spider-Man" and shows him crawling up wall. Reverse shows split image of Peter Parker and Spider-Man with web bkg. and reads "With Great Power Comes Great Responsibility" as well as "Spider-Man First Story 1961." Conan coin reads "Conan The Barbarian...A Thief..A Reaver..A Slayer" and shows Conan in ancient ruins, reverse showing his helmet, sword and fur and reads "Barbarism Is The Natural State Of Mankind..And Barbarism Must Ultimately Triumph" along with "Conan The Barbarian First Appeared October, 1970." Each coin has "Official Marvel Collectors Coin" followed by corresponding Roman numerals I-III. Spider-Man coin has a few tiny tarnish dots to front. Hulk and Conan coins have a bit of patina but all are still Exc./N. Mint. Extremely limited distribution. Each coin has unique serial number on rim. Medallions come with their original zip-loc plastic bags. Extremely rare and the first complete set Hake's has ever offered. Nice quality set.