The Fantomen Pusslet Contest (which translates to The Phantom Puzzle Contest) was held by Semic Press in Sweden in 1971. The contest required the reader to select the correct puzzle block panel to complete an image of the Phantoms face from an option of 10 images. The front cover of edition number 4 containing the contest can be seen below.

Found on the inside back cover of the comic book, we see a full page advertisement promoting the contest. The contest was held only in this edition, requiring the reader to select the correct puzzle block panels from a selection of 10, with only 5 blocks required to complete an image of the Phantoms face. A coupon was then required to be posted to the publisher with the correct 5 answers written on the coupon, with the entrants address details. The Fantomen Pusslet Contest on the inside back cover of the comic book can be seen below.

Translated to English, the contest page reads:
COMPETE and WIN!
The Phantom Puzzle.
We have a puzzle, depicting the Phantom’s face. It consists of twenty pieces. When we were going to put it together, we discovered that there were five pieces missing! You see the rooms where they should be. But then we found two more pieces and you can see them next to the half-finished lot! FIVE of the pieces are the missing ones and we wonder if you can’t see who they are. When you’ve done that, just send in the coupon to Fantomenpusslet, Fantomens tävlingsexp, 109 48 Stockholm. BEFORE FEBRUARY 23, we want your solution and in ISSUE 11 you can see if they won!
Prizes on offer weren’t Phantom related prizes.
Winners of the contest were announced in Fantomen comic book edition number 11, published in 1971.
