GenieAccording to Elderly Instruments' catalog, "Most new Martin guitars come with a Corian nut and a Micarta sadlle". These are just two different plastics. Only the vintage re-issue and limited edition series come with real bone (since the originals that they are copies of had bone). They must have changed sometime in the 80's as my '74 D-35 (sorely missed) definitely had real bone and my '92 DC-28 definitely does not.
Bruce