I've been browsing through the December, 1916, issue of St. Nicholas magazine — one hundred years ago. That magazine, as I noted a couple of posts ago, was intended for a young audience. All of the issues before 1924 are available online as PDFs. When looking at old magazines I always find the advertisements interesting. Advertisers, of course, motivated to sell a product, are always attempting to appeal to their potential buyers and, if they're any good, will provide some insight into those folks — both the children and their parents. These ads are all from that December issue of the magazine. The ads can all be enlarged to make the text more readable.
Parker Pen, of course, was located in Janesville, Wisconsin:
Sleeping on a glowing watch may not have been a great idea: