Yeah I've ran into a few old abandoned houses out in the country that I think still have their older model fuse boxes....one in particular I think was maybe a 30 amp service....I took a pic but I don't have access to it at this time...but the fuse box was located outside on the front porch just below where the meter once was...I want to say it held 4 fuses, the round light bulb glass style fuses...but I didn't look to see which legs were fused and which were not.
Were homes equipped with 60 amp service centers before the days of electric ranges and electric dryers? Is that when/why the 100 amp came out....because of electric ranges and electric dryers being introduced?
