Hi Timm,
nice axe indeed. Perhaps not the oldest but interesting nontheless! The stone looks to me more like nephrite which is more found along the shore (more in direction of New Zealand) as it is green with the characteristic black spots.
The rope used -am not sure if you know- is actually also quite special as the bright yellow and reddishbrown are made from orchidstems! These are therefore more laborintensive to make. These were also used to make a special bodyarmor as the fibers are quite sturdy n smooth (arrows would bounce off).
The only reason why I think it may not be so old are the diagonal lines on the wood shaft and the patine. Could be early collected?!?
Anyway congratulations! Still a nice finds (surely exchanged for a few nuts n peanuts
not?)