Blue, I looked at a 23 Sceptre up in Jupiter for Island Trader before he found his 21. As I remember, it was an 80's vintage post-Potter era boat, and it also had a hook in center panel on port side, about 1' fwd of transom.
As I understand it, there was one Potter mold that had a hook in it and he supposedly warned the SeaCraft Industries outfit about it when they bought him out and told them not to use it. However it evidently did get used anyway. Denny