The subject item is best identified as Amko 17 Jewels Mechanical Wristwatch, c.1955, Mid-1950s, Swiss-made movement; Amko (Swiss/American Private Label). Operating primarily in the 1950s and 1960s, Amko cased imported Swiss ébauches for localized jewelry and department store markets in North America. Amko was one of many mid-century private labels that utilized robust Swiss movements to provide precise, affordable timepieces to the growing middle class. The 17-jewel manual wind movement features 'Inc Bloc' shock protection and 'Antimagnetic' properties, representing peak mechanical reliability before the quartz era. The prominent labeling of shock and magnetic resistance on the dial reflects the post-WWII race to make timepieces durable for everyday professional wear.

Valuation for generic, private-label vintage watches is driven almost entirely by mechanical condition and dial preservation rather than brand-driven premiums. Primary sold comparables indicate a strict retail ceiling of $150 for fully serviced, aesthetically restored Amko watches. However, the auction and peer-to-peer collector markets present a more grounded baseline. A running Adria/Amko 17-jewel example recently sold for $80, and similar unserviced vintage examples often clear around $100 on platforms like Yahoo Auctions. Our fair market value range reflects an unserviced but intact auction outcome for a watch-only package. Should the movement be seized, heavily water-damaged, or the case exhibit severe plating loss ('brassing'), the value defaults to a $20-$30 parts-only floor.