Take lots of good quality pics showing every angle and every mark on it. Send them of to the NRA Museum with a request for basic info.
The .32S&W served for many years as the caliber of police departments across N & S America, Europe, and the "civilized" parts of Asia. That being the case, it's not something to be sneeded at. Sure, bigger stuff works better, but after all those years the line of folks willing to stand in front of it and get shot remains very short.