Im new here, I intend to stay also since I'm a long time knife and edged tool collector. I do have a question. I was given a Mann KnotKlipper double bit axe. The head is 9&1/2" long 4&1/2 wide about 5lbs. It has a sharpened crescent on one bit 1/2" deep & 2" wide. I'm sure it was used to trim knots off logs I haven't seen one before. Any Ideas?