Thank you, Anne, for alerting me to the revival of this thread.
Hi, Chimpmad. And thank YOU for reviving the thread! No, the bowls haven't been sold for a couple of quid ;-) They are still sitting in my cabinet.
However, I think I have to disappoint you (not to say myself) as the foot rims do appear to be unglazed. That is to say, there appears to be a coarse sort of glaze over the rim, but then there is a layer of smooth, shiny glaze over the top, which does not reach right to the foot rims.
On the smallest bowl of the three the glaze is very patchy, as you can see, but the dirty areas appear to be without any glaze, which is why the dirt is ingrained (although I have never tried to wash them very thoroughly for fear of damaging them).
Didn't I see something like these on the Antiques Roadshow recently? I remember thinking the one(s) I saw looked a bit like mine, and thinking, "Oh, wouldn't that be nice ...... but I could never get that lucky" ;-)
Leni :-)