This Holmes Basic Set advertisement is new to me. I found it thanks to the blog 5 Stone Games posting a link to a tumblr called Old School FRP, where this ad is on the second page. The OSF tumblr blogger started D&D with Holmes - see their very first post, which shows the Holmes set cover.
|NOT JUST A GAME|
Here's a similar ad from Model Retailer, a trade magazine. Same photo & also touts the new module now found in the set (the 1st edition had Geomorphs and a Monster & Treasure Assortment):
|THE BEST IS BETTER!|
To see more Holmes Basic Set advertisements, see this thread on OD&D Discussion. I plan to eventually organize these better on the actual Zenopus Archives site. Most of the ads that I have are posted in that thread, so if you know of one that is not there, please let me know.