These pieces are the DGT Timeless set (offered by DGT w/ their e-Boards). I've seen this set with two different bishops. THe DGT site offers the set with a modified bishop. But you can find the exact set you are looking for on Chesshouse.com:
http://www.chesshouse.com/dgt_electronic_chess_boards_s/361.htm
After scrolling down the google picture archive enough times i found these stock photos, resembling what i'm looking for . Anyone know the piece set name?
These unique chessmen seems to be used at this photo as well http://en.wikipedia.org/wiki/File:Waganjan_rafael_20061029_berlin_bundesliga.jpg