The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is WPN. This MIC (WPN) stands for the company name Western Plastics which is currently Out of Business. This boat manufacturer code has other company names (WPN sometimes goes by these name(s) if applicable: , , , or ). This could happen if the US Coast Guard reissued the MIC to a new company after the first went out of business.
This company (Western Plastics) is owned by and is located at S San Benito Ave in Gerber state of Ca. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Western Plastics has started making boats, yachts or other watercraft as of and went out of business on (9/9/1977) in the following country: USA.
More details at the US Coast Guard.