Did Sylvania also have a rectangular color tube in 1957??

[rca2000]

I have the wonderful magazine "color television, 1957 edition" , which many here seem to regard as the "holy grail" of early color tv magazines. It is very informative, with many articles on 1957 model color sets. Most of the various companies selling color sets would bow out by the followng year--as we all know, due to the lack of col.or interest, till about 1961 or so, when the "revival of color" began--, nudged by Disneys "Wondeful world of color", for real that time, and forever.


One thing that caught my attention. ON page 14, top right, it shows a table model Sylvania set, model # 314T304 also listed in the guide on page 7 for sale at 595.00. This set seems to have a RECTANGULAR tube--but I had heard and read that only the Westinghouse set had a rect. tube, not very successfully either. Has ANYONE seen one--ever??

Also, on page 64, abnd also on the ETF site, it describes the GE 'POF tube, using "post accelleration" and a selecting grid , like the chromatron. What happened to that tube--did it also suffer from "aluminum sputtering" which supposedly plagued the Sony chromatron??

I have to be careful with this magazine, as it is old and I KNOW what can happen to vintage magazines from too much handling, and it was not that easy to come by.