Hello Louie,
Great bolo. I have seen bone grips before on Philippine pieces (mostly daggers) but not on a bolo. This looks like it might have a nice laminated blade and possibly be pre WWII but with a newer sheath. I also was watching this and would have probably came in second place on the bidding. First bid to low and not enough time to place the second.

Have you received it yet and if so does the tang extent through the hilt? If you would, please post a close-up of the end view of the hilt when you can. Congratulations on a very nice addition to your collection.
Robert
P.S. If you get tired of looking at this please let me know.