Welcome to TFF.
Looks like you already have it about right with the revolver. It's a WW2 vintage S&W military and police revolver. One thing to keep in mind is it was originally made for the less powerful .38 S&W cartridge. Many were converted to .38 special later on. I would only shoot low/ standard power loads in it if I were you, never hot ones.
I have seen several of those with blown cylinders over the years!
I cant say what it would be worth in the US, someone will, but in Europe around $150.00.