This is one I bought a while ago, primarily for the interesting band that turned out to be a Spiedel with "57" on either end. Didn't have the heart to split the band from the watch, as it is much better than I expected and keeps time. Case and band show almost no wear, face is nice, but the original glass crystal has a few little hacks. This was my watch of the day (to wear).
1957 Senator "B".