{"product_id":"circa-110-years-old-iwc-schaffhausen-antique-c-1915-cal-73-pocket-watch-conversion-early-portugieser-lineage-serviced","title":"Circa 110 Years Old  IWC Schaffhausen Antique c. 1915 \/ Cal. 73 Pocket-Watch Conversion \/ Early Portugieser Lineage \/ Serviced","description":"\u003cdiv class=\"collector-notes\"\u003e\n\u003cp\u003eThis IWC Schaffhausen timepiece is powered by a manually wound Calibre 73 movement dating to circa 1915, as established through the movement’s serial number. Originally produced for a pocket watch, it has subsequently been converted for wrist wear, bringing an important example of early 20th-century Schaffhausen watchmaking into a contemporary format.\u003c\/p\u003e\n\u003cp\u003eCalibre 73 also holds an interesting place in the broader history that eventually led to the IWC Portugieser. It was the open-face, or Lépine, version of IWC’s 17-ligne movement family, while the closely related Calibre 74 was its hunter, or Savonnette, counterpart. In 1939, IWC selected Calibre 74 to power the earliest Portugieser Reference 325 watches.\u003c\/p\u003e\n\u003cp\u003eThe restored dial preserves the period character of the piece, while its substantial pocket-watch movement and wristwatch conversion create a distinctive combination of historical engineering and modern wearability. It offers collectors a tangible connection to the early large-calibre tradition that would later become central to the identity of the IWC Portugieser.\u003c\/p\u003e\n\u003cp\u003eThis watch was last serviced on 08-07-2026.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IWC Schaffhausen","offers":[{"title":"Default Title","offer_id":54831484207446,"sku":"726-2,2","price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0520\/6641\/8838\/files\/circa-110-years-old-iwc-schaffhausen-antique-c-1915-cal-73-pocket-watch-conversion-early-portugieser-lineage-serviced-726-2-2-dial-1.jpg?v=1785229374","url":"https:\/\/e-v-w.com\/en-nl\/products\/circa-110-years-old-iwc-schaffhausen-antique-c-1915-cal-73-pocket-watch-conversion-early-portugieser-lineage-serviced","provider":"EVW Exclusive Vintage Watches","version":"1.0","type":"link"}