Two similar early 18th century candlesticks

Two similar early 18th century candlesticks,

one London 1705, maker's mark lost in decoration, one London 1717, maker's mark C?,

circular form, knopped stems, later chased foliate decoration, spool-shaped capitals, on raised circular bases, later engraved with a crowned B, height 16.8cm, approx. weight 19.8oz. (2)

The coronet of a marquess above the initial 'B', possibly an abbreviation for Bath, Berkhamstead, Beverley, Blandford, Brackley or Bristol.