Model numbers didn't start unitl @ 1957. It it has one it will be inside the crane area.
1888-1937
Smith and Wesson makes several hammerless revolvers and to my knowledge they range from .22 all the way up to .44 Mag. The easiest way to tell what caliber a gun is chambered in would be to check the barrel or slide markings.
That is the .38 Safety Hammerless (4th Model), made c.1906.
I have almost the same revolver, you find out what is the value?
50-500 usd
No serial number provided.
Impossible to answer without knowing what caliber it it.
Model number 732 does not exist.
Need to know the caliber in order to answer.
I believe that the last Smith and Wesson hammer less model was the stainless model 60 chief,s special that was made in 1998. IT had a 2 1/2in barrel and was double action only.
You need the services of a gunsmith.
There have been a number of "hammerless" revolvers made, ranging from the tiny Baby Hammerless .22, thru the Iver Johnson and US Revolver Hammerless topbreaks, and includinurrent day Smoth & Wesson revolvers. All DO have hammers that are internal to the handgun frame.