This is a Smith & Wesson Revolver: Double Action known as the 637|Chiefs Special chambered in 38SP, model # 163050, UPC 022188630503
Model Series: 637|Chiefs Special
Gun Type: Revolver: Double Action
Caliber: 38SP
Action: Double Action
Capacity: 5
Finish: Glass Beaded Stainless Finish
Stock: Uncle Mikes Boot
Sights: Front: Integral Rear: Fixed
Barrel Length: 1.875
Overall Length: 6.3125
Features: Round Butt/ Semi-Target Smooth Target Trigger