There are quite a few models some are 8 tube and others are 7 tube.
your query was:
zenith 825----G725---H755 ?
9pin 6ab4 12ba6 12ba 12av6 19t8 35c5 or 35b5
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Schematic is found :
BEITMANS VOL 15 PAGE 126-127
models T825F, G, and R, and Chassis 8T01
6bj6 6AB4 12AT7 12BA6 12BA6 12AU6 19T8 35C5
(FROM LEFT TO RIGHT CLOCKWISE 12AT7 6AB4 6BJ6 12BA6 12BA6 12AU6 19T8 35C5)--------------------------------------------------
Pictures look the same so I think some models have almost what you may look for.
5 hours of searching.
https://www.pinterest.com/pin/an-olde-zenith-radio--99079260540448408/
https://www.flickr.com/photos/michaelpinto/8087577669/in/photostream/
https://www.pinterest.com/pin/50524827041765113/
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