Snake,

I saw the same Model 10-3 on ebay and I also thought that it looked like an unusual blade profile. From the handle moving forward, the blade started out looking more like a straight point version, but "dropped" as it neared the point (looking more like a drop point version). I have examples of Model 10s in both SP and DP configurations, and this one looked like neither of them to my eye (though the ebay photos were not ideal). It looked to have somewhat of a 'hybrid' blade profile, falling somewhere in between the SP and the DP. Whatever it is, it seems as if many bidders felt it to be unusual (or valuable due to its vintage?), as it brought a strong price ($391).