I recently obtained a 24" D-8 Disston Hand saw. After reading the info on the Disstonian Institute site I found that the etch has the 8 inside the D makes it pre-1928. However, the handle had only 4 total bolts including the medallion. Their site shows that this type of handle was found on the D-30. However it says the D-30 had a straight back where this saw has a skew back. The handle appears to be apple wood and is closed at the top..Could this be a transition saw going from the D-8 to a D-30? Thanks, Dan W.