Yes you need a key. I am assuming the lock is not broken in some way and a key will work to unlock it.I see the hex screw at the base of the hammer. So this means there is a key needed? Where does the key go?
Divebum, I'm just curious, does your 62A have the hex head bolt at the base of the hammer like the one in the photo I provided? Isn't that the Taurus locking system? As I stated in my first post I know zip about the gun, just basing my thoughts on what I see in the photos.I have a Winchester Model 62A and it does not need a key to make it fire. Other than the firing pin, I don't know what to tell you.