B&w picture tubes, larger than 23"

[Olorin67]

Yes, that 30" round tube was probably the largest.. i started this thread to ask if there were later square corner tubes bigger than the ubiquitous 23" from the 60"s. The answer seems to be YES, but they dont seem too common. People who were able to spend enough to afford them probably spent thier $ on color sets instead, at least in the USA. Still would be interesting to see sales literature from the period that shows 25" or 27" b&w models.