As Scorch says, there is .32 S&W which came out in the 1870s for topbreak revolvers and the .32 S&W Long which came out with the Hand Ejector (swing out) guns around 1896. So for about 20 years, there was only the one .32 S&W, no need for short or long like the other guys, and they did not see the need to rename the .32 S&W when the .32 S&W Long came out.
There were also .32 H&R and .32 MH. The .32 H&R will accept .32 S&W Long.
The .32 MH is very similar but of a particular OAL because of the Merwin & Hulbert revolver's peculiar "selective extraction."
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