A late 19th century French black marble and inset mantel clock garniture, the domed case with gil

A late 19th century French black marble and inset mantel clock garniture, the domed case with gilt metal dial signed 'H. Riondet 9 Bd Poissonniere Paris', Brocot escapement and Arabic numerals, the signed backplate numbered 16246, bell-striking movement with mercury compensated pendulum, the case with two brass pillars flanking a bevelled glass panel upon a shaped plinth, with a pair of urns en suite, 42cm high, 35cm wide