Measurements: base width 11cm, height 21cm. Weight: 2kg for the pair. The following are from internet research. This type of candlestick is sometimes known as a "rat de cave" or cellar rat. The handle, the rat's tail, moves up the spiral, and so pushes the candle upwards as it's used.
This also protects the candle from being knocked over and makes it easier to remove when depleted. The origins of this type of candlestick go back as far the second century, when French monks used them in Burgundy wine cellars. The item "Pair of English Vintage Art Deco Brass Spiral Candlesticks by Laurence Butler" is in sale since Sunday, April 14, 2019. This item is in the category "Antiques\Silver\Silver Plate\Candlesticks/Candelabra".
The seller is "ukoldshop" and is located in Shenzhen. This item can be shipped worldwide.