Joe, When George O'Day started in the boating business it was as an importer of mostly British-built sailboats. He actually never planned to actually build the boats that he sold, but strictly sell boats built by others, the origins of the O'DAY Sailboats that we know and love were all built for O'DAY by Marscot Plastics in New Bedford. The story is that Palmer Scott (of Marscot) eventually (in around 1959-60) decided to merge his fiberglass boat line with Beetle boats (not the wooden catboat "Beetle", but the fiberglass boat company started by the son of the original wooden cat builder.) and he needed to end his building of the O'Days. George O'Day then moved his company to Fall River and his company now built the boats themselves. Later, after Bangor Punta bought out O'DAY around 1965, George O'Day went back to selling imported sailboats under the compnay name "GEMCO", these were again mostly small daysailers. He also had a part in the start of Grampian Yachts in Canada.
Interesting trivia: The company, American Boatbuilding, that was formed by the merge of Marscot and Beetle ultimately faded away, but part of that company re-emerged as "BEE Fiberglass" building various fiberglass items (liquid tanks mostly) in a building just outside the entrance to the Fall River Industrial Park. If you get off Rt 24 North at Airport Rd., the building is/was almost directly across the street from the ramp.