Yes, it is.
It's a "Nernst lamp", named after its inventor, Walther Nernst, a German scientist, who developed it in 1897.
Search for "Nernst lamp" on the internet for information on how it works and lots of pictures.
The pictures on eBay (item no. 221410452561) are bigger than those you've posted, and there is enough detail to suggest
that this lamp may be still functional. The seller states the lamp is English, which I doubt, from the style of the markings on the cap.
The seller also dates the lamp as 1950; however it is much earlier, possibly 1905, making the seller's date as typing error.
There is a YouTube video showing one of these lamps lit. The description gives the date as 1905, and the maker, Adria, as Austrian.
The video was posted by a member of this group, Stanislav Slabyhoudek. There is a link to his collector's site in the links section on this site.