Guild 1978 catalog, back cover. The Guild B-302A bass adorns the back cover of this catalogue. The ash bodied version of the B-302 (shown and described on page 10) was available in natural finish only, with a maple neck and rosewood fingerboard.
This image was used in Guild advertising in 1978 (see it here Guild B-302. Makes You Glad You're A Bass Player) with significant additional text.