Great-granddad's Axe

"This is my great-grandfather's axe", the man said with evident pride and no little awe, pointing to an axe displayed above his mantle. "It has been in the family for 150 years; they sure don't make 'em like that anymore: with this axe, my great-grandfather started, my grandfather continued, and my father completed the clearing of all this land I work."

"Hmmm," I said, noncommittally.

"Of course," he continued, "in all that time it was being used, before I hung it there as a monument to my forefathers, we did have to replace the head five times and the handle three. In fact, I still have two other of the 'original' worn heads."