23 center console

[ScottM]

Bryan pretty much nailed it on the head, but there is a difference between a 20 SF and a 20 MA. The MA has a different liner and gunwale cap than the SF. If you look through some of the model brochures on this site, you'll see that SC occasionally changed the name designation for the CC boats during the Potter years, but SF remained the most consistent name for the 20- & 23-foot CC boats.