Mike (http://clickthing.blogspot.com/) has a Royal HH too. His differs in two respects. His has an elite typeface (mine is pica) and his also has a paper gauge.
This handy little device lets you know when you have reached the bottom margin of your paper. Bottom margins have been the bane of typists since the dawn of typewriter time. While Mike's HH from 1956 has the gauge, my HH from 1954 does not have this feature.
These are the little things that really interest me. It was some time between 1954 and 1956 that Royal first introduced the end-of-paper gauge to their desktop typewriters. This kind of bleed-over in features can be seen with the FP that Scott painted purple:
The odd bit: a palm tabulator with an FP. Scott's is a little broken, but it still works I'm sure. Maybe it was a custom thing or maybe Royal had a few extra pieces lying around.
The more time you spend around typewriters the more you see these fun little things.
