[kapteeni]

This must have been your inspiration I guess.
(Sorry for the bad quality...)

OOH i remenber having that poster too way back in early 70. I used to be a member of the finnish Phantom Club. Number 4721 to be precice (IIRC). We had a codekeycard and in every number of Mustanaamio (Phantom in finnish) there was a secret message.
Our team was called Striking Lightnings! Man, those were the days!
Can't wait the map!
kapteeni