In Phil Sharpe's 1937 handloading manual, he says that the .32 ACP cartridge can be used in revolvers chambered for the .32 S&W Long. But no discussion is made beyond that. I would not attempt using .32 ACP in any old top break revolver chambered for .32 S&W - assuming that it would even fit. The .32 ACP case is slightly longer than the .32 S&W case, so that is probably not possible, but you never know, especially regarding the cheaper .32 top break revolvers.

I once accidentally overloaded (by about 1/2 grain) a box of .32 ACP reloads, and I was a little leery of firing them in any of my .32 autopistols. So I did fire them in one of my .32 S&W L revolvers without anything bad happening.