My original concept for pre TOS cruiser from about fifteen or so years ago. I liked it, but now I think it looks a bit too clunky.
-class star slipper (and variants) from a century or more before the TOS era. Something like this could have been cool instead of reusing the Botany Bay footage as the olf freighter in "The Ultimate Computer."
MJ's original sketch that inspired my pre TOS cruiser.