Somewhere in the past I'd been given to understand that you did have a background in Horology and even worked in that demanding field to some extent.
I am, myself a total amateur, as likely to do damage as to actually repair anything along those lines, though foolishly perhaps, I have been known to try on occasion.
I believe that the "Riverside" that you worked on was not actually a "Brand" but was rather a "Grade" of watch made by Waltham (AWWC), which was also a Railroad Grade watch, meeting those standards.