Nice find! Indeed, some tubes are hard to find in different colors than 640 or 535 (depends on popularity of colors in your country). I've got some T8 23W of these in Daylight and one Osram L25W/19, which is unfortunately EOL.

Here in Switzerland, the 640 color was extremely popular, in GB I think it was (or still is) the 535 White and in Germany the 740 "Universalweiss".

In Poland during the reign of T12s 765 was the most popular color (though other colors were produced in much smaller quantities) in case of 20W and 40W tubes but 25W were always an odd case as practically only 3500K and 4300K tubes were made. I've never seen a daylight 25W made in Poland. Old double deck trains from GDR originally had 25W tubes but later a great portion of them was converted to 20W, it was possible to differenciate them at night even from far away solely on the base of color, daylight interior lighting meant 20W, warmwhite meant 25W.
To comment on color preferences in Poland in a more general way, when T8s were introduced they were for a long time most popular in daylight version, probably due to a long tradition of daylight tubes and people being accustomed to such color. However at some point daylight popularity started to fade and now 840 took over, with 830 in some places. Similar tendencies happen not only in case of typical 18W and 1.2m 36W tubes but also in case of specialised 1m T8 tubes. Both 23W and 1m 36W are available in 830, 840 and 865 variants but train operators typically order only 840 tubes. Though daylight color was for a long time popular in case of linear tubes, the paradox is that compact fluorescents in Poland were only available in warmwhite colors. SL magnetic compacts were made in Poland both in 827 and 865 variants but the latter one was made almost exclusively for export, in a typical shop in Poland you would find only 827. The same was for electronic compacts, 840 and 865 ones only started appearing in shops ±5 years before the LED revolution. Fortunately LEDs are available in every color straight from their massive introduction to popular shops, including ones that are single color and the ones that offer many colors in one bulb.

These lamps were seen more in Holland for some reason. I have an older one and came from outside shop commercial light. Sylvania was the only brand that made several weird sizes of fluorescent tubes. How old is this one?? Nice find!

These were not very common here in Switzerland but still widely used in sign lights and some window cases. I think that this size is now about to be discontinued... including the 23W T8 variant.

Overall in Poland 1m tubes can be found only in trains. Some 25W gear for 220V 50Hz was made in the 50's but later general use 25W fixtures and gear weren't made anymore. So far I know only about one building where 25W tubes survived in non-working condition, there is no known another place, big contrast to relatively significant presence of 1m tubes in train interior lighting. 25W T12s as such are dying breed as Philips 1m 36W T8s and different chinese T8s took over.
This tube was made in current century. Photos were made some time ago, sadly this tube went EOL and was replaced so photos are already archival.