{"product_id":"circa-60-years-old-sheffield-antimagnetic-alarm-vintage-1960s-watch-cal-baumgartner-frres-bfg-90-movement-serviced","title":"Circa 60 Years Old \/ Sheffield Antimagnetic Alarm \/ Vintage 1960s Watch \/ Cal Baumgartner Frères BFG 90 Movement \/ Serviced","description":"\u003cdiv style=\"text-align: center;\"\u003e\n    \u003cdiv\u003e\n\u003ca href=\"https:\/\/www.youtube.com\/shorts\/XSeCmRWd7TU\" title=\"Vintage 1960s Sheffield Alarm Watch | BFG 90 Caliber #Shorts\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0520\/6641\/8838\/files\/Youtube1_480x480.png?v=1761813971\" alt=\"Watch Video\" style=\"float: none;\"\u003e\n    \u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"text-align: center;\"\u003eYou save 369,00 EUR right away\u003c\/h2\u003e\n\u003ch2 style=\"text-align: center;\"\u003eThe service and identification document is included in the price.\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cdiv class=\"collector-notes\"\u003e\n\u003cp\u003eThe Sheffield Antimagnetic Alarm, produced circa the late 1940s to early 1950s, is a fascinating example of post-war Swiss mechanical watchmaking. Its most distinctive feature is the fully mechanical alarm complication, combining everyday practicality with an unusually inventive movement construction.\u003c\/p\u003e\n\u003cp\u003eThe watch is powered by the manually wound Baumgartner Frères BFG 90, a rare 17-jewel alarm caliber fitted with two separate mainspring barrels: one supplying power to the timekeeping mechanism and the other operating the alarm. Two small coloured apertures on the dial indicate the winding status of the respective springs. The alarm time is selected using the red arrow-shaped indicator, while the external control positioned on the side of the case activates or deactivates the alarm.\u003c\/p\u003e\n\u003cp\u003eThe silver-toned dial retains an attractive period appearance, featuring applied Arabic numerals, luminous hour markers, syringe-style hands and a central seconds hand. The inscriptions “Antimagnetic,” “Alarm” and “17 Jewels” clearly communicate the practical and technical character for which these watches were designed.\u003c\/p\u003e\n\u003cp\u003eThe case combines a chrome-plated base-metal body with a stainless-steel resonator back. Marked “TRIVERA” and “Fond Acier Inoxydable,” the perforated outer back was specifically designed to amplify and release the sound produced by the mechanical alarm hammer. The inner cover is signed “Sheffield Merchandise Inc. – Swiss Made,” confirming the watch’s Swiss manufacture for the Sheffield brand and the American market.\u003c\/p\u003e\n\u003cp\u003eSheffield operated as a private-label watch brand, offering Swiss-made timepieces primarily to international, and especially American, customers. Although it was not positioned alongside the major Swiss luxury manufacturers, this model is particularly interesting due to the mechanical complexity and uncommon architecture of the BFG 90 caliber.\u003c\/p\u003e\n\u003cp\u003eWith its twin-barrel movement, winding indicators, rotating alarm-setting system and resonating case back, this Sheffield is considerably more distinctive than a conventional mid-century wristwatch. It represents an unusual and increasingly collectible chapter in the history of mechanical alarm watches.\u003c\/p\u003e\n\u003cp\u003eThis watch was last serviced on 09-06-2026.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"specifications\"\u003e\n    WATCH ID SKU: 626-3,7\u003cbr\u003e\n    Brand and model: Sheffield Antimagnetic Alarm\u003cbr\u003e\n    Reference: Unknown\u003cbr\u003e\n    Case material: Steel\u003cbr\u003e\n    Case size: 36 mm\u003cbr\u003e\n    Lug-to-lug: 44 mm\u003cbr\u003e\n    Thickness: 14 mm\u003cbr\u003e\n    Dial: Original\u003cbr\u003e\n    Crystal: Acrylic (period-correct)\u003cbr\u003e\n    Crown: Original\u003cbr\u003e\n    Strap or bracelet: Calf leather strap\u003cbr\u003e\n    Movement identification: Caliber Baumgartner Frères BFG 90\u003cbr\u003e\n    Jewels: 17\u003cbr\u003e\n    Movement type: Manual\u003cbr\u003e\n    Estimated production: circa 1960s\u003cbr\u003e\n    Water resistance: Splash Water Resistant (handwashing ok, not showering)\n\u003c\/div\u003e\n\n\u003ch3\u003e📦 What’s Included\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBox\/Case:\u003c\/strong\u003e Secure black travel watch case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDocuments:\u003c\/strong\u003e Invoice and our service certificate worth €369 — included free of charge\u003c\/p\u003e\n\u003ch3\u003e🚚 Shipping, Returns\u003c\/h3\u003e\n\u003cp\u003eInsured worldwide shipping. 14-day inspection (unused, seals intact). Pro packing with tracking.\u003c\/p\u003e\n\u003ch3\u003e🛎️ Call-to-Action\u003c\/h3\u003e\n\u003cp\u003eQuestions or an offer? Click “Negotiate Your Price.” Serious collector inquiries welcome.\u003c\/p\u003e\n\u003cp\u003e🔧 \u003cstrong\u003eIncluded Service Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e💰 If you ever decide to sell the watch, a documented service will significantly enhance its market appeal and resale value.\u003c\/p\u003e\n\u003ch3\u003e🛠️ A professional service worth €369 — included free of charge.\u003c\/h3\u003e\n\u003cp\u003eThe service includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFull disassembly, ultrasonic cleaning, and lubrication using Moebius synthetic oils\u003c\/li\u003e\n\u003cli\u003eRegulation and timing adjustment\u003c\/li\u003e\n\u003cli\u003eUltrasonic case and bracelet cleaning (if applicable)\u003c\/li\u003e\n\u003cli\u003eFinal technical \u0026amp; aesthetic inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e📄 An official service certificate is provided, listing key technical and identifying details — ideal for insurance, provenance, or future resale.\u003c\/p\u003e\n\u003cp\u003e🛡️ This ensures peace of mind and removes the need for servicing for the next 3–5 years.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Sheffield","offers":[{"title":"Default Title","offer_id":54350324236630,"sku":"626-3,7","price":790.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0520\/6641\/8838\/files\/circa-60-years-old-sheffield-antimagnetic-alarm-vintage-1960s-watch-cal-baumgartner-fr-res-bfg-90-movement-serviced-626-3-7-watch-2.jpg?v=1782394107","url":"https:\/\/e-v-w.com\/en-mc\/products\/circa-60-years-old-sheffield-antimagnetic-alarm-vintage-1960s-watch-cal-baumgartner-frres-bfg-90-movement-serviced","provider":"Exclusive Vintage Watches – Swiss \u0026 Omega Vintage Watches","version":"1.0","type":"link"}