While there isn't a single definitive product widely known as the "WALS Collection - Part 1," this likely refers to one of three popular collections: the (fine arts), Wallace Collection (the 1960s/70s rock band), or the Where's Wally? (Waldo) essential travel sets. The Wallace Collection (Fine Arts Catalogue)
If you are looking for a review of the scholarly art volumes, of the Wallace Collection is an essential academic resource. WALS Collection - Part 1
It includes six postcards that you can color in and send, plus a checklist for all the hidden items like Woof’s bone or Wizard Whitebeard’s scroll . While there isn't a single definitive product widely
For music fans, "Part 1" often refers to the opening track or first side of the Belgian pop-rock band’s work. Wallace Collection (the 1960s/70s rock band)