bwalder Collection / Serial #638123 Hamilton Grade 926 Serial #638123 Movement Image Dial Image Case Image Manufacturer Hamilton Grade 926 Serial Number 638123 Size 18s Model 1 Jewel Count 17 Setting Lever Finish Nickel Case Material Silverode Case Manufacturer Philadelphia Watch Case Co. Case Serial # 632129 Dial Material Enamel Dial Type Singlesunk Dial Style Roman Dial Signing Name Hamilton Watch Co.