So far I've only seen b/w sets with the 100s, 300s or 400s, and the colors with the 400s, 500s, or 600s. But this remote says differently: http://cgi.ebay.com/Vintage-Space-Commander-300-Remote-1970s-2-Button-/300511329046?pt=Vintage_Electronics_R2&hash=item45f7defb16#ht_1368wt_767

Anyone ever seen a color Zenith with the 300 before?

I've seen those... '67-'68 19" metal table models. I wish I'd kept one of those sets... They suddenly disappeared after being super-common in the repair shops in the 80s.

Charles