Blue porcelain vase with gold trim

I was wandering along Bankside yesterday around 3pm, near the Tate Modern, when I realized my blue-and-white porcelain vase wasn't in my tote. It's a hand-painted piece about 25 cm tall, white porcelain with cobalt blue floral motifs and a thin gold rim. There is a tiny chip on the rim and a faint maker's mark 'M. Ito' on the bottom that I can't quite read in photos. It was a gift from my grandmother and means a lot to me; it helped brighten my living room for years. If anyone finds it, please drop me a note — it would mean the world to have it back.