Cast iron post hole diggers

[gearnoggin]

I plucked this out of an old trash pit today. I've never seen post hole diggers made out of cast iron before. Anyone know the approximate age of these?

 

[Tenspeed]

Interesting design with replaceable blades. It looks like it would be hard to mount the handles.

I have no idea of the age.

 

[Sawyer]

75 years, 8 months, 16 days, 13 hours, 29 minutes(approximately)! I have never seen cast iron ones, however I used so many steel ones that I learned to hate them! How many post holes on a fence that encloses a square mile? Too damn many!