Mystery board

i was looking at this board one of my friends found down in hatteras. its obviously from the 70’s with a bright orange paint job. the logo says “easy rider” in red white and blue and under it says “hand shaped by dewey” i looked at it for a good amount of time and it sorta looks like a flying pig…sorta. it had no leash plug but had a removable single fin. i would say it was about 6’6-6’8. the foil was geared extremely to the front and had a huge round tail on it. the serial was 18408 i think? or somewhere close to it. anyone have an idea if it is really a dewey or what it actually is?