Yep the good old Relco 480 (but possibly gold plated given the price !) To be fair though, I believe there is a lot of variability so Shelyak select the better ones and discard the rest. Starlight Xpress use it in their spectrograph too. A great discovery by Richard Walker who should be on commission! My first tests with it in the LHIRES are here
http://www.spectro-aras.com/forum/viewtopic.php?f=8&t=606&hilit=relco+starter#p2380
Robin