I think it may change at some stage but early was chamois/covert I believe. You need to work out(or someone could tell you) what colour the console was.
Most likely it was changed to black as some of th 70's trim colours dated badly. They had great paint choices but trim always seems to date quickly.

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Change to HZ appearance is no worries. Most people updated to the latest in the series as time went on anyway. Everyone converted to WB fronts and lights and now are going back to earlier series on WB. Fashion trends in cars hey.