Yes, good to go.

yes it is +p rated however +p ammo will cause more wear on any gun

Yes. I bought one of these Australian. 38s from buds a few years ago. No issue with +P. Of course of you feed her a steady diet of +P she will see more wear and tear. Great revolver!

Phil, yes Sir. I've asked a awhile ago to Smith and they said any post WW2 gun is gonna be "safe" for plus p. I've put several hundred plus p loads through my M&P pre 10 from 1947 and never noticed any issues. So take that for what it's worth. If your picking one up from the late 50s onward I wouldn't even worry about it. Todays 38 Special standard loads are pretty much a joke. They are no better than the 38 Colt that the 38 Special was supposed to replace. The 38 Colt was loaded to get 750FPS from a 6" barrel with a 150gr bullet. That's about what standard loads are now getting. The +P loads are just an attempt to load to real 38 Special original load pressures and charge you an extra amount for doing so. Cheers and stay safe!

Should be. +P designation comes after 1972/1973. However, according to S&W any all-steel revolver with a model number (post-1957) is safe with +P ammo. Most factory .38 Special +P ammo made today barely breaks 18,000 psi whereas the limits are 20,000 psi. I think it is fine but don't use buffalo bore stuff. I hope this helps!