The Charles J. Koch Trophy is awarded for the best combined results for Class B-2 in the Off Soundings Club Spring and Fall Series. From 1965 to 1980, this class had 40-50 boats racing and was very competitive. In this 16 year period, 6 different Dolphin 24's won the Koch Trophy 11 times:

1957 - William Scranton's Trina (Not a Dolphin 24 but every Dolphin has her genes)

1965 - Stan Barnes' Shamon

1968, 1972, 1976 and 1977 - E. Carlton Granbery Jr's Savilli

1969, 1970 - Aborn "Denny" Smith's Trump II

1971 - Walt Strang's Black Dolphin

1973, 1974 - Allen Anderson's Tigress

1980 - Tom Marstrand's Marionette