AMPM24US via Amazon offers the Kronen & Söhne Men's Hollow Case Mechanical Pocket Watch in Black, Gold, or Silver, model no. KSP032, for $27.99. Coupon code "XHK4R5N8" drops it to $13.99. Plus, Prime members bag free shipping. (Non-members can spend $49 to bag free shipping; otherwise, shipping adds $4.48.) That's the lowest total price we could find by $6. It features an alloy case, skeleton dial, and 17-jewel movement.