Literature for 1960's era Zenith Table Radios

[cpacamper]

I have a Zenith X337, a late 1960's model similar in appearance (and performance too maybe?) to the C/H845 models. Some of the original Zenith tubes seem to have a 1968 date on them, maybe this was one of the last ever table top tube radios made? All it needed out of the box was electrolytic recapping and it does sound real good for a 40 year old radio.

I am hoping someone has some Zenith literature, owner's manuals, etc on this model or other related 1960's Zeniths?

Thanks!