IWC REF. 3521 INGENIEUR PLATINUM ROTOR STEEL International Watch Co., Schaffhausen, "Ingenieur", Officially Certified Chronometer, Automatic, case No. 2603832, Ref. 3521. Made in the 1990s. Fine, tonneau-shaped, center seconds, self-winding, water ...
1995 IWC Ingenieur Ref. 3521 - Rocks and Clocks
.jpg?mode=max "IWC, INGENIEUR, REF. 3521, | Christie's")
IWC, INGENIEUR, REF. 3521, | Christie's
HODINKEE reviews the vintage ref. 3521 Ingenieur SL from IWC
IWC Ingenieur 3521 antimagnetic for $6,341 for sale from a Private Seller on Chrono24
IWC 3521-001 Ingenieur Automatic White Dial SS / SS (35091) | European Watch Co.
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IWC 3521-001 Ingenieur Black Dial SS / SS (18881) | European Watch Co.
Review: Rare watches, The Collector's View: The IWC Ingieneur Ref. 3508 -
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Serviced/IWC invoice/Certificate Extract) IWC Ingenieur 1990s' Full Tritium REF. 3521
IWC Ingenieur IW3521 Black Dial Automatic Watch – Signature Watches
IWC Ingenieur with box and some papers IW 3521 for $8,858 for sale from a Trusted Seller on Chrono24
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IWC Ingenieur for $10,512 for sale from a Private Seller on Chrono24
HODINKEE reviews the vintage ref. 3521 Ingenieur SL from IWC
IWC Ingenieur 3521 unisex watch. - Catawiki
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![IWC] Ingenieur ref. 3521. A Gérald Genta classic! : r/Watches](https://preview.redd.it/473gntbzs9c21.jpg?auto=webp&s=77f939917bfd5ff6a51d012ae151737be5e837e6 "IWC] Ingenieur ref. 3521. A Gérald Genta classic! : r/Watches")