Bringing this old thread back to life for a bit. My only Kelly registered, I would like to think the handle is original to the head, but I don't know that for sure. 4lb head on this connie. I copied someone's version of how to date these axes and pasted it below. I can't speak to it's accuracy.
"1910: Stamped 1910 in rectangular area, Unit number stamped but not underlined or squared off.
1911: Stamped 1911 in rectangular area. Unit number stamped OR hand etched (changed around 22,000) and underlined/squared off.
1912: Stamped 1912 in rectangular area. Unit number hand etched and underlined/squared off.
1913: Stamped 1913 in rectangular area. Unit number hand etched and underlined/squared off.
1914: Stamped 1914 in an arched area. Unit number hand etched and underlined/squared off.
1915: Stamped 1915 in an arched area. Unit number hand etched and underlined/squared off.
1916-1930: No date in arched area. Unit number hand etched and underlined/squared off. No “True Temper” or “Kelly Works”.
1931-1939: No date in arched area. Unit number hand etched and underlined/squared off. “True Temper” stamp.
1940-1941: No date in arched area. Unit number hand etched and underlined/squared off. “True Temper” over “Kelly Works” stamp.
1942-1945: “True Temper” over “Registered” over “Kelly Works”. "