Note, knob is broke on one side but still works and tightens.

This Mercury Marine CLAMP BRACKET ASSEMBLY is used on these models and components: 1973 1200203 CLAMP AND SWIVEL BRACKET ASSEMBLY1974 1200204 CLAMP AND SWIVEL BRACKET ASSEMBLY1975 1200205 CLAMP AND SWIVEL BRACKET ASSEMBLY1976 1200206 CLAMP AND SWIVEL BRACKET ASSEMBLY1977 1200207 CLAMP AND SWIVEL BRACKET ASSEMBLY1973 1200223 CLAMP AND SWIVEL BRACKET ASSEMBLY1974 1200224 CLAMP AND SWIVEL BRACKET ASSEMBLY1975 1200225 CLAMP AND SWIVEL BRACKET ASSEMBLY1976 1200226 CLAMP AND SWIVEL BRACKET ASSEMBLY1977 1200227 CLAMP AND SWIVEL BRACKET ASSEMBLY1976 1200506 CLAMP AND SWIVEL BRACKET ASSEMBLY1977 1200507 CLAMP AND SWIVEL BRACKET ASSEMBLY1976 1200526 CLAMP AND SWIVEL BRACKET ASSEMBLY1977 1200527 CLAMP AND SWIVEL BRACKET ASSEMBLY