Have Slide Rule, Will Travel, from a ad promoting careers in science. I used these in college and had to use to do calculations to make standard solutions in Endocrine lab - that had to be in the early
1951 SLIDE RULE Print Advertisement DIETZGEN by phorgotten
I love the slide rule prop. but it couldn't possibly be a slide-rule widowER?
Overlapping ads for Breck Shampoo and National Accounting Machines.
A commemorative stamp honoring the anniversary of the accounting profession in the United States
The Appeal of Slide Rules - For Use and as Collectables.
1933 Underwood Elliott Fisher Accounting Machines Original Vintage Print Ad | eBay
Nationals Return Us On Our Investments! (Ad from (We had one in our office, got a number in and could not get it out because no one was sure how to work the thing in Finally, accidentally removed that number.