Boat ID

[Monkey Butler]

After removing many layers of paint I found a HIN. It's tough to read but it looks like it starts with "CDO" but it could possibly be "CPO" or "GDO" or "GPO".

CDO - C-Dory Maraine, Auburn WA
CPO - CAPE FEAR FLOTATION, Southport NC
GDO - CHESAPEAKE COMPOSITES INC, Hollywood MD
GPO - GLAS-PLY, Snohomish, WA

The last four digits are "0183" which means it's a 1983, correct?

Google searches on all of the above didn't turn up anything that looks like mine.

Anybody?