>I do know they are rare and hard to get.
Ya, tell me about it. Took a fair time to find ones in good condition that were not priced through the roof. Mine do not have any blade etching. I got lucky though. 2010 has just been a bonus year for SAKs.
I heard the dogbones might have been designed for people with arthritis, to allow for easier opening. They just seem like they are just for anyone that does not like using their nails (or have no nails). Several people tell me a SAK is hard to open... not for me.