IWC Portofino Enamel Dial Ref.3513-1 34.0mm C.37521 1991

The quintessential minimalistic timepiece, the IWC Portofino 3513-1. With its clean enamel dial as white as fine china, and a sleek set of steel hands perfectly matching the aesthetic. It’s a gorgeous showcase of IWC’s lesser known side of elegant watches that has been around for over a hundred years. Paired with its original stainless steel buckle and a beautiful handmade crocodile leather strap, making it the perfect piece to slide under the cuff of a dress shirt or an everyday classic. Not to mention this particular piece comes with its original hang tag with its exact serial number as well, making it a truly collectible timepiece.

In addition, this timepiece comes freshly serviced with all parts laid out by our professional watchmaker for all to see in the images above. Little to no other dealers do this and it’s a testament to full transparency here at Montre D’or. With the C.37521 inside running excellently as shown in the timegrapher reading above, just like it was when it left the factory over three decades ago.

DIAL:

• Original white enamel dial in gorgeous vintage condition with even marks of age


• Elegant steel stick style hands in a perfect minimalistic look


• Applied steel stick hour indices, crisp and clean


• Applied IWC logo and original cursive wording


• Date window at 3 o’clock with quickset feature


• Original domed sapphire crystal

CASE:

• Slim and refined round Portofino case design, professionally polished to retain all edges


• 34.0mm (excluding crown) / 39.0mm lug-to-lug / 7.0mm thickness


• Stainless steel construction in excellent condition


• Original IWC fish logo crown at 3 o’clock

CASEBACK:


• Screw-on stainless steel caseback with a mix of brushed and polished surfaces


• Clean and sharp professionally polished to perfection

• Comes with plastic protective sticker as shown

MOVEMENT:


• IWC caliber C.37521 – Automatic High Beat movement


• 21 jewels / 42 hour power reserve / 28,800 mph


• Date quickset functionality (Avoid 9pm-3am when doing so)


• Movement freshly serviced and in excellent condition


• Last serviced: January 2026


• Accuracy: ~0s/day

STRAP & BUCKLE:

• Handmade Black Crocodile leather strap, 18.0mm lug width


• Original IWC stainless steel clasp, aftermarket tongue

AFTERCARE PACKAGE:


• Comes with a black wooden box + silica gel


• Free PolyWatch Acrylic Crystal Polishing kit


• Warranty/Service history card for easy future sale


• 6-Month warranty (non-user damage)


• Exclusive Post-warranty service access


• 7-day return policy for peace of mind

SPECIFICS


Maker: IWC


Model: Portofino


Year: 1991


Case Material: Stainless Steel


Reference: 3513-1


Case Serial number: 2498964

Movement Serial number: 2487784


Caliber: C.37521


Diameter: 34.0mm


Lug to lug: 39.0mm


Lug width: 18.0mm


Thickness: 7.0mm


Lume: NIL


Bracelet/strap: Handmade Black Crocodile Leather


Clasp: Original IWC stainless steel clasp


Box and papers: Original Hang Tag


Accuracy: ~0s/day


Movement type: Automatic


Jewel count: 21 jewels

Power reserve: ~42 hours


Frequency: 28,800 vph


Crystal: Original IWC domed sapphire


Crown: Original IWC fish logo crown


Last service: January 2026

Free express tracked shipping with signature upon delivery. Delivery within Singapore in 1-2 working days. International shipping may take 2–12 working days depending on destination. Do note respective custom duties might apply which includes the recent US tariffs and are the buyer's responsibility.

Do note that for US bound shipments the PolyWatch polishing kit will not be included in order to mitigate customs delay due to new customs requirements

Countries that we do not ship to: Algeria, Nepal, Pakistan, Russia, Vietnam, Iran

This is a vintage timepiece and water resistance is not guaranteed. Please avoid contact with water or moisture. Store the watch with dry tissue or silica gel to preserve its condition. We are not liable for water damage post-purchase.