https://www.thegunparlor.com/products/smith-wesson-022188636901-022188636901-3873

MANUFACTURER: Smith and Wesson
MODEL: 640
TYPE: Revolver
ACTION: Double Action Only
CALIBER: 357 Magnum | 38 Special
FINISH: Satin Stainless
FINISH TYPE: Stainless Steel
FRAME: Steel Frame
STOCK/GRIPS: Black Synthetic
GRIP TYPE: Synthetic
BARREL: 2 1/8"
OVERALL LENGTH: 6.6"
CAPACITY: 5
SIGHTS: Black Blade Front Sight
SIGHT TYPE: Fixed Sights
WEIGHT: 22.1 oz.
SAFETY FEATURES: Internal Safety Lock
ADDL INFO: Enclosed Hammer
ADDL INFO: J-Frame