Can anyone provide info on a Smith and Wesson hammerless five shot revolver which at first I thought it might be a 22 caliber but possibly a 32 caliber?

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.