Larry Wood and Bob Rosas designed A-OK in 1978. The hot rod Ford Model A went through 5 variations until 1983 when, according to the Hot Wheels wiki, the mold broke. The casting was re-tooled in 2008 for the Since ’68 series. I picked up this lightly-worn model on eBay. Without the original packaging, it’s impossible to know whether it’s from the Flying Colors or the Oldies But Goodies series, but this light green variation is the 1978 original casting.