In the Encyclopedia
, everything is assumed to be the same unless specifically contradicted, hence all TOS starships are Constitutions
and all pre-TOS ones are of the Daedalus
class. But that's just silly: diversity is a more realistic assumption than uniformity.
Since there are just twelve ships like Kirk's, it's pretty unlikely that we would actually encounter any of these during the TOS adventures, because space is big. Thus, when a ship looking like Kirk's is seen, it's probably not
part of the twelve/thirteen...