Interesting discussion on the later black fascias on HJ Sandmans. I wondered why the part number was revised for type 4 dash on commercials. Maybe they decided they wanted to separate the HOLDEN/Belmont/Kingswood from GTS and Premier/LS. I'd say the woodgrain type 4 dash appeared at the same time as the black did on the M & N models. There was a trim revamp around 8/75 so that would be a close approximation.
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