Circa 110 Years Old IWC Schaffhausen Antique c. 1915 / Cal. 73 Pocket-Watch Conversion / Early Portugieser Lineage / Serviced
Circa 110 Years Old IWC Schaffhausen Antique c. 1915 / Cal. 73 Pocket-Watch Conversion / Early Portugieser Lineage / Serviced
EVW PRODUCT NR: 726-2,2
You save 369,00 EUR right away
The service and identification document is included in the price.
This 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.
Calibre 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.
The 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.
This watch was last serviced on 08-07-2026.
Brand and Model: IWC Schaffhausen Pocket watch movement
Case Material: Stainless steel
Case Size: 43 mm
Lug-to-Lug: 52 mm
Thickness: 13 mm
Dial: Professionally restored by a dial specialist using period-correct techniques
Crystal: Mineral
Crown: Period correct
Strap or Bracelet: Calf leather
Movement Caliber: Lep. c. 73
Jewels: 17
Movement Type: Manual
Movement Serial: 8754•••
Estimated Production: Circa 1915
Water Resistance: Splash Water Resistant (handwashing ok, not showering)
📦 What’s Included
Box/Case: Secure black travel watch case.
Documents: Invoice and our service certificate worth €369 — included free of charge
🚚 Shipping, Returns
Insured worldwide shipping. 14-day inspection (unused, seals intact). Pro packing with tracking.
🛎️ Call-to-Action
Questions or an offer? Click “Negotiate Your Price.” Serious collector inquiries welcome.
🔧 Included Service Benefits
💰 If you ever decide to sell the watch, a documented service will significantly enhance its market appeal and resale value.
🛠️ A professional service worth €369 — included free of charge.
The service includes:
- Full disassembly, ultrasonic cleaning, and lubrication using Moebius synthetic oils
- Regulation and timing adjustment
- Ultrasonic case and bracelet cleaning (if applicable)
- Final technical & aesthetic inspection
📄 An official service certificate is provided, listing key technical and identifying details — ideal for insurance, provenance, or future resale.
🛡️ This ensures peace of mind and removes the need for servicing for the next 3–5 years.
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