(After writing the previous post, I had a hankering for coffee, so I just made myself a cup...)
One of the sites I found online while googling Postum is Javaholics Antique Coffee Mills. Mostly it is about just what the title says -- antique coffee mills. However, they do have some old advertising for coffee and coffee paraphernalia. The one that caught my eye is this:
Something about "Wedding Breakfast Coffee" seemed wacky. That is a really niche market to be selling to! In that image of the bride and groom at breakfast (click for bigger image) there seems to be a lot of stress. If I were in my white wedding gown, I would probably be stressed about drinking and spilling coffee too. Yikes.