A table lamp most likely made as a kerosene lamp from the beginning. This is a really rare piece of lamp of model Blue Fluted from Royal Copenhagen. This lamp is of model number 426 and is 26.5 cm high (10.6") including the lamp holder, 18 cm (7.2") without. It is 12.5 cm (5") in diameter. It is scratched over the waves but hard to see what quality it is, probably second. I cannot see why it is marked as 2nd quality though since it is in excellent condition.  

See my other auctions for more Blue Fluted, if you buy more than one object I will combine the shipping.