Doesn't look quite right to me either...........the blues catalogued for the 9099 bowls were Sapphire, Arctic, Kingfisher, Sky Blue and it doesn't look either of these. Antique Blue was used only for Toby Jugs according to my info.
What is the diameter? And what is the rim finish like, does it roll over so that you can grip it with fingers easily? Seen a lot of odd "look a likes" recently where the inside of the rim is straight i.e no finger grip, if you know what I mean.
If you can get it on to IS IT on
www.whitefriars.com to give it a chance of some other views.........I am very uncertain of it from your pics.