Watch Hickok45's video, he is blowing up bottles of soda and watermelons with his. The Model 57 is a cannon.Yes it’s model 57-3 I’ve never saw one etched on the barrel unless it’s a model 657 mountain gun .
As far as the etching, I don't know about such things, but you have a good gun there.
Hickok45 makes a really good point, at around the 19'00" mark.
The 41 Magnum never got off to a good start, and it never caught on; and part of the reason is that the .357 Magnum is so good.
But, that is water over the dam, and all of the magnum revolvers, have been dinosaured by autos.