Two different designs. I plan to put them both back into service. One is a double bit I think. No idea on the other one. It looks homemade.
The single blade looks hand forged judging by the odd shaped eye socket. Be fun trying to get a good handle fit in that. Are you making your own handles or buying them and fitting Slacker ? Post after pics if you do.
I've never replaced a handle before so this will be a learning experience. I was considering heating the single bit And attempting hammering the hole back uniform. I think it went out of shape due to use. The hammer side has seen some serious use. Wish I knew its history.
Double bit and Jersey pattern single. All the knowledge you need in this publication from US Forrest Service 9923-2823P-MTDC: An Ax to Grind: A Practical Ax Manual Iv'e seen damaged heads like that before- looks like it was used as a splitting wedge