QUOTE I was aware of that, plus the fact that at least some of those 23" sets had originally been classified as 25" before an FTC(?) ruling regarding visible size. I was wondering more about smaller tabletop/portable sets like this one. When I was growing up in the '80s and '90s, most of the smaller tabletop color sets were available as 5", 13" and 19", and I don't recall seeing many sets in between, yet that ad shows 15", 16" and 17" sets as well. I'm wondering when the (relatively) odd portable sizes went away, and things became more homogenized. END QUOTE
Sony color started with a 12" then 8,15, 17, 19 over the 1970's.
Tube built USA sets were 14", 16", 19" then bigger ones.
When they went solid state 13", 15", 17" & 19"
Almost all sizes up to 27" were built over the years after 27" a few
sizes were skipped.
Canada kept the old system so a 20" set was actually a 19" almost every
where else. There was a class action suit over all this with computer
monitors. IIRC you got $10 or something if you filled out the form. I did get a rebate.
73 Zeno
LFOD !