Mar 3, 2014
Prestolog H. Kempenich 1935; 5.25” Ø
This is one of my recent acquisitions. It's not flashy or colorful, but I love it. The font, the colon followed by a dash, the arrows: it's aces. There are a lot of similar profit calculators, but this is the first one I've seen that I really wanted to add to my collection.
The back, as with many volvelles from this period, has an imprint for a company, the Brown Bulb Ranch, with the slogan, "Figure greater profits on Bulbs."