The Metamec catalogue describes this clock as: 'An inexpensive mantel clock in real alabaster. Brass bezel and fret'.
The vase in the back ground is a Wedgwood copy of the Portland Vase. The original vase is now in the British museum - it is made of cameo-glass and believed to have been made in Rome between 5AD and 25AD.
I bought this clock earlier this year at the Edenbridge car boot sale for under £2. It was in a working condition but a bit dirty and the base had broken off. I've just cleaned it up, stuck the base back on, wound it up and I'll see how long it runs for...
Reference: metamec-clockmaker-dereham - page 236