Actually there are more than just dozens of old photos taken during trips my parents made in the mid to late 1930's. There is a pretty good size storage container full of them. The are inclusive as I recall of trips beginning near St. Louis to Yellowstone, Pikes Peak, a loop through Texas, including the Rio Grande Valley. As I recall many of the U.S. designated highways depicted in those photos were gravel.
You may have the holy grail there! I hope that as time and opportunity present, you will share. I've never seen a photo of a gravel US highway. Closest I've come is to drive a road in western Indiana identified as an old alignment of US 36. It's gravel. Here are some photos: http://www.jimgrey.n...of_Bellmore.htm
While I haven't gone looking for any of all the film types required by old cameras I have I suspect some are getting hard to come by and not something anyone would find these days in their local Walgreen's or Wal-Mart.
Finding film for old cameras has become increasingly difficult over the past 20 years. The older the camera, the more likely you can't get film for it. It is actually easier to identify the sizes still in
production. 35mm film remains relatively popular, of course. Size 120 still exists, primarily because it's still used in professional applications. You can still get 110 film if you look hard. You can buy foreign-made 126, 127, 620, and 828 only from specialty retailers and it co$t$ bigtime. You can even spool your own 620 film using 120 film and two 620-sized spools -- the only thing different between the two is the spool. If your camera takes any other size, as far as I know you're out of luck.
I blogged a few times about old cameras. I included some photos taken with a couple of my old cameras -- ones I could get film for, anyway, when I took the photos, going back to the 1980s. My favorites were the 1930s Ansco box camera (120 film) and a Kodak Duaflex from the 50s (620 film -- could still get that film when I had the camera).http://jimgrey.wordp...i-like-cameras/http://jimgrey.wordp...om-old-cameras/
I started collecting again in the past couple years, half-heartedly, and here's the camera I got most recently:http://jimgrey.wordp...-synchro-model/