I'm no expert, and I originally thought this was a Triang no. 60, but having read Marion Osborne's excellent book on Triangs, I now wonder if it might be a no. 23. It measures 16.25" high by 13 and five eighths inches wide, and 9 and five-eighths deep, which means it can't be a no. 60 or an A. The book gives measurements of 16.25" high by 13.75" wide for a no. 23, which seems to fit pretty closely.
Anyway, whatever it is, I still think it's cute !