In another forum here, someone has pictured a Model 10-10. It looks like an ordinary M-10 heavy barrel, but his has the round butt, made for the Victoria (state) police in Australia. Some have been sold off here recently.

I thought the M-10-10 was a variant sold in Brazil. It looks like the French order for three-inch barrels (lugged) and with fixed sights sold to France for their Presidential guards. Those are .357's marked as M-19's. Because of local laws, the Brazilian guns have to be limited to .38 Special chambering. Without a special collector's license, that's the most powerful revolver an ordinary Brazilian can own, and that includes most cops.

What's the deal here? Both versions of the M-10 can't be the M-10-10, can they? Both do have round butts. Am I wrong about the model number on those guns for Brazilian sale?

I think very similar guns have been sold in the Ladysmith line.

When S&W makes guns for law enforcement they make whatever the customer wants if the money is right. How it is marked is not as important as that the customer gets the specs it wants. We sort it out later.

I realize that, but my question is whether the Brazilian guns and those for Victoria are both marked as 10-10's.

That could confuse collectors, as they are not the same configuration.