Glen, thank you, I was sure you'd be able to solve the mystery :kissy: and to Joan, for her invaluable help, please pass on my thanks. :clap:
The vase did have 12 panels - I managed to count them before it met its sad end. What is even sadder was it was given to my Mother as one of her Christmas gifts and was demolished on Boxing Day. :cry: The luckiest part of the sad tale was that two other Carnival vases, a Tiffany lamp, a pottery clock, and various other nick-nacks which also met the hearth were not damaged at all, so losing only one vase was in fact lucky.

Now to track down a replacement for Mum!