[cwren2472]

Thanks guys, after more digging I agree its a MM1 due to the angle iron frame vs MM2 with a tubular frame. I guess I was a little confused, I thought that was only the name of the mounting system not the actual plow.

It is the name of the mounting system. And specifically the MM2 has a lever on the tower that releases the pins unlike the MM1 that the pins need to he manually removed. The fact that the tower construction is different is unrelated

So over the years do all Fisher plows have the same bolt pattern for mounting cutting edges?

For the same size and class plow, such as 8' HD, yes they are all the same.

 

[cwren2472]

its a MM 2 Tower (you can see the Jack leg in pic #3 and 5)

It's a MM1 - the cam bars that would move the pins out are missing as is the lever on the front that will release the pins.