I have a '73 and agree that your trailer is likely older. I notice that you are missing the city water tap on the counter. You also appear to have an older version of the
furnace. Another difference - I don't see a track for the
awning.
My
boler did have an identification sheet glued to the inside of one of the upper kitchen cabinet doors. It specified the dates of manufacture,
weight ratings, as well as various other statistical data.