If this is a .38 cal (check the markings on the frame and barrell) it is chambered for .38 caliber. If it is a Police Positive ammunition would be the .38 PP If it is a Police Positive Special you could use .38 PPS Check with any reputable gun shop/dealer or range and they'll give you the information you need.
It is .38S&W, which, for reference, is not the same at .38 Special. Yes, it is still available, but not an extremely common round. You may have to order it online or check with a gunshop and see if they can get it.
38 special unless it's a 38 S&W, then 38 S&W cartridge. should say on barrel.
It should have the caliber marked on the barrel,such as"38 Colt New Police".
32 caliber is a little smaller then the 38 caliber
manufacured about 1915.....................
made about 1917
38 caliber revolver ammo
made about 1919
about 1929
Assuming it is a Police Positive Target if it is .22 caliber. It all depends on condition and exact model (1st Issue, 2nd Issue). Anywhere from $200 to $700 plus. sales@countrygunsmith.net
1931
50-350 usd