Someone way smarter than me will chime in with better info - but since the CA plant was closed in 78, the trailer was made in 78 or earlier given the badge with CA and OH listed. I’d guess late 60s but that’s not based on any meaningful knowledge (like all my posts here [emoji3]).
Ooh, ooh, I know! It is a 1969. The square back window was supposedly unique to the 1969 edition. The front wing windows would also have square corners on the bottom.
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