There's one WETA logo you left out - circa 1992 or so. I've seen it countless times at the beginning of "Washington Week in Review" back in my youth. If I recall correctly, on a white marble background, we see three blue stars in a triangular formation, with red stripes next to it. Below is the WETA text, in the same font as "The Ribbons I" (1988), but a darker, gold font, and "WASHINGTON, D.C." in tiny black lettering below that. It has two shining lines - one going across the top, and the other going the down the left side. Its jingle is a violin flourishing into a long orchestral note, in the key of C.

 out of  found this valuable. Do you find this valuable?