Re: 1973 30 identification
The sedan would have a bulkhead across the cockpit under the hardtop; and enclosing the lower helm. The badge "Commander" is one of many product lines. For example:
28 Ft Catalina
33 Ft Coho
Express, sport fisherman, sedan, tournament, open are some of the names that refer to the layout and design of the craft.
Now that I've confused you even more, how's she coming with the cleanup ??