I think Potter changed from the original Moesly diamond pattern non-skid to the stripes on the 20's about '73 or 74 when he raised the decks. As far as I know, all the 23's have had the stripes. The attached Boating Magazine article on the '73 Sceptre/Tsunami, which I think was published when the boat first came out, shows the stripes in one of the pictures. Sounds like the deck in yours has been replaced and whoever did it didn't want to do the extra masking required to create the stripes!
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