For detailed informational lists regarding PT boats, visit www.ptboats.org, and www.hazegray.org/navhist/pt/. Much of the date information found below was taken from Steve Laroe's work found at the hazegray site. His lists detail specific dates for all boats, in many categories.

A brief overview of PT 1 through 103
PT 1 through 19 were considered experimental:

PT boats 1 and 2 were a 58' design built in 1941 by Fogal Boat Yard Inc. They featured a design with the deck to sheer joint a wide radius. Although interesting I think this limited their useful deck area. The stem angle was fairly square to the deck.

PT's 3 and 4 were 58' and were built in 1940 by Fisher Boat Works. Their appearance is similar to the Fogal boats.

PT's 5 and 6 were 81' and built in 1941 by Higgins Industries. They look fairly close to final designs. They feature an angled stem that curves smoothly into the keel.

PT's 7 and 8 were 81' and built in 1941 by the Navy. They are superficially similar to PT's 1 through 4 but of an aluminum hulled design.

None of these first 8 designs ended up meeting ever-changing Naval requirements. The Navy turned its eye across the Atlantic to England where promising designs were in production.

PT 9 was a 70' British Scott-Paine designed boat (PV70) built by British Power Boat Company and purchased by ELCO in 1939 for study.

PT's 10 through 19 were built by ELCO in 1940 and were based on PT 9 with some Navy requested changes. They have the recurved stem of the Scott-Paine design that give the bow profile a pointed look, and a 70' length.

Although promising, the US Navy wanted more boat length to handle their preferred torpedo, a longer, 21" width design. Previous PT boat designs had been built for 18" torpedos. They also wanted the hull beefed up to enable it to survive heavy seas in the open ocean. ELCO was awarded a contract to build 24 boats to the revised specs.

PT's 20 through 44 were built by ELCO in 1941. They are 77' long and have the recurved stem. This model was the first to see combat, PT 41 was LT. John Bulkeley's RON 3 boat.

Meanwhile, Higgins and Huckins developed designs of their own to compete in a 1941 Navy competition coined "The Plywood Derby". Although ELCO came out on top, the Navy awarded contracts to all 3 builders. Both Higgins (76') and Huckins (72') changed their contract designs to a 78' length.

PT's 45 through 68 were built in 1941 by ELCO in a 77' length.

PT 69 was the Huckins contest entry and was 72' long.

PT 70 was the Higgins contest entry and was 76' long.

PT's 71 through 94 were 78' long and built in 1941 by Higgins based on their contest entry.

PT's 95 through 102 were 78' long and built in 1941 by Huckins based on their contest entry. None of these boats saw combat but were used for training and homeland defense area patrol.

PT 103 began the last major change to ELCO's hull design. Length was increased to 80'. The stem angles fairly straight back then curves into the keel. This design is the one most often modeled.