Flashback Friday with Tom Hutson:
Tom Fruitticher at “The Bay”, in Ft. Pickens 40 (ish)years ago.
Here’s Tom’s explanation:

This was one of the first four fins that ever came out. Yancy let me try it out but it was real stiff and tracked really bad so I only rode it for two days at the Point and then gave it back and traded for a thruster.
Photographer: unknown