Sevket Gezer, who's pipes are normally referred to having been carved by Sevket, works from his home in Eskisehir, Turkey crafting some of the most beautiful and intricate meerschaum carvings found in Turkey today.
He is truly one of the masters of the stone, turning out not only the most delicate floral and lattice work but also he is the premier source for rotating ring pipes. Not only can you get a gorgeous pipe with a rotating ring (an engineering marvel in itself) but he also is the only person known today that can carve calabash pipes with rotating caps! He is also available for custom carved pipes from those who appreciate his work.
You can see some samples of his work at http://www.tobacco-barn.com/s-95-sevket.aspx
The influence of his work can be seen in newer carvers like Ekrem and others.