Travelling candlesticks were made from the early 1740s. The early ones were formed as two hemispheres. Later in the 19th Century oval examples appeared with folding sockets and scroll handles. Another type is club-shaped. This pair is a good example of the earliest travelling chambersticks. Formed as two hemispheres, having candle sockets which can be unscrewed, laid loose on either side of the central boss and the other hemisphere inverted and screwed into the first.
For comparative literature:
Michael Clayton, The Collector's Dictionary of the Silver and Gold of Great Britain and North America, Suffolk, 1971, p.66, 67.