Mobilaero Collection / Serial #121580 Hamilton Grade 943 Serial #121580 Movement Image Dial Image Case Image Case Markings Image Manufacturer Hamilton Grade 943 Serial Number 121580 Size 18s Model 2 Jewel Count 21 Setting Lever Finish Nickel Case Material Gold Filled Case Manufacturer Philadelphia Watch Case Co. Case Serial # 1025234 Dial Material Glassenamel Dial Type Doublesunk Dial Style Roman Dial Signing Name Hamilton Watch Co. Movement Markings "Adjusted", serial no., and "Safety Pinion" stamped on train bridge. "Hamilton Watch Co. Lancaster Pa.", 21 Jewels" stamped on Barrel bridge.