On SVT 1 and 2 (SVeriges Television) there is clock on the right
The PM5544 generators provide options for many components of the card to be turned on or off. The "[ ]" color brackets either side of the central circle can be turned off, for example, and I've seen it broadcast without them occasionally. The clock option was seldom used here as I recall.
There's what I would guess is a 1960s Sveriges card on the "Around the world" page of the Meldrum site:
I don't think Telefis Eireann kept that test card for very long either. It was very rapidly replaced by their homebrew version which is above.
Test card E wasn't actually much different from D. In fact the only real change was that the frequency gratings were shaded to a sinusoidal form rather than squarewave, and apparently dealers didn't like it because it made the sets appear to be out of focus on them!
They needed a 405/625 line test card as soon as the 625 line transmitters went live in the early 60s.
BBC2 started here on 625/UHF in 1964, and apart from a few experimental cards it used mostly a redesigned 625-line version of test card C, even after BBC1 and ITA had switched to D.
Color arrived on BBC2 in 1967, but BBC1 and ITA were still on 405/VHF monochrome-only at that point. If you look at the original version of "F" you can see that the frequencies were actually marked alongside the gratings, from 1.5 to 5.25MHz.
When BBC1 and ITA started simultaneous 625/UHF color broadcasts a couple of years later, they used the color "F" card for both services, even though it would be only monochrome on 405/VHF. The frequency markings were removed, as they wouldn't be correct when converted to 405-lines.
I understand that some regional "opt outs" continued to use "D" on 405 in the early 1970s, but I don't recall ever seeing it. When I started paying attention to the test card -- probably around 1972 or so -- it was F, but then we were seeing signals from Crystal Palace (London), so we weren't subject to any of the regional switching.
The other change to "F" was that the original card had just cyan castellations across the top. The slide itself remained unchanged, but they soon started electronically inserting a few lines of standard color bars at the top. It wasn't until sometime in the early/mid 1980s that "F" was converted into digital form and generated electronically.
There was an interesting statistic a few years ago that Carole Hersee (the daughter of a BBC engineer) was the most seen person on British TV in terms of "hours on screen." That may well have changed now since "F" has disappeared into obscurity, but I find it rather amusing that 90% of the British public would recognize that little girl instantly yet very few could name her!