1976 - 16' doral information

[Niagara Mike]

Hi guys ..

I just got my 3rd boat a 1976 16' Doral with a 115 evinrude and I'm in the middle of getting it ready for summer..
I'm redoing the stringers and floor.. transom is solid as a rock.

I was buffing the outside of the boat today to see what and how I can bring it back to life and I noticed that beside the Doral logo on the boat...its says SEADO X3RD

I checked both sides and yes it seems that it is in fact just faded away..

My question is does anyone have any information on this boat?
I have searched online and I cant seem to find another one like it.
I uploaded a pic.

thanks for your time.