Q1... The FR on the serial number denotes the model
Q3... Later on today I will look at the mechanics of my WFR mounted in the cabinet and try to get some answers for you
Q3... The decals are definitely well worn and silvered. It is up to you if you would want to try to fix them or do a repaint. Personally I would keep her as is. Or you could find a WFR head in better condition to remount into the cabinet. I see them quite often on my local Craigslist and Shopgoodwill website. Your preference.