Dennison began losing their design prowess relative to their boxed goods in the late 1940s and early 1950s. Most of their efforts from this time are forgettable. However, this boxed set is actually pretty cool. The assorted designs have a minimum of the anodyne imagery Dennison habitually used at this time. I've only seen the skeleton seals in a set that came out of Canada. This may be worth picking up!
Mark B. Ledenbach's vintage Halloween collectibles blog.