Yep Its post 1964, think it was either 1972 or 75? Will scrape the rest of the paint off the plate and make a note of the number.
Ours is a stores/Binned trailer. One side is full of stacked boxes, the other has 2 rows of boxes then a drop down table with pin board behind, Then more boxes. Across the far end there are two bunks.
Any info or pictures would be interesting.