The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is ETR. This MIC (ETR) stands for the company name East Troy Marine which is currently Out of Business. This boat manufacturer code has other company names (ETR 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 (East Troy Marine) is owned by Lester Rose and is located at 2108 Church St in E Troy state of Wi. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. East Troy Marine has started making boats, yachts and other watercraft as of 9/14/1977 and went out of business on (12/28/1983) in the following country: USA.
More details at the US Coast Guard.