This is an awesome set of rare Dennison seals. The seller is correct - these first appeared in Dennison's 1924 Bogie Book. There were two leaf designs - one smiling and one frowning. Both were sold with stock number H684. Sustainable guide value is $180. I have not seen a full box of these offered for sale for many years. It'll be fun to see what they fetch.
10/06 Update: This great set brought an eyebrow-arching $511.23. The prevailing bidder must have wanted the set VERY badly, as this price probably won't be seen again.