i also have a question about the marking on the bottom, it says 475"B"...not sure what that is. if anyone could help out, that'd be great. here is the link to my blog, i made it so.
and a couple of pyrex-related post i've written in the past, if you'd like to see some more pyrex. the last link has lots of photos...
quinoa salad recipe (in a pyrex bowl)
an unconventional use for pyrex (but hey, it works)
14+ reasons i love vintage pyrex (what are your reasons?)
have a great week everyone!