Certified Authenticity
Every watch is authenticated before delivery.
Real Family Business
You're buying from genuine people, 30 years in business.
Bizak & Co. Warranty
Every watch is checked by us before shipping.
Reference IW516403
IWC Portofino Hand-Wound Moon Phase IW516403 Slate Index Red Gold Leather 45mm - BRAND NEW
By IWC
Sourced to order. We confirm the watch, condition and final price before purchase. Reference images shown.
Eligible watches: 90-day returns for store credit only. Brand-new watches and other exclusions are final sale. Return terms.
The IWC Portofino Hand-Wound Moon Phase IW516403 is a brand-new 45mm red gold dress watch featuring a refined slate dial with index hour markers, a matching red gold bezel, and an elegant leather strap — a compelling expression of IWC's Portofino line at its most romantic and technically accomplished.
The IW516403 stands out through its rare combination of a warm red gold case, an understated slate dial, and the poetic moon phase complication that has defined the Portofino collection's identity for decades; contact Bizak & Co. today to purchase this reference at the best price or to learn more about acquiring it online.
Compare it across every Portofino Hand-Wound Moon Phase reference we carry, or browse the full IWC collection at Bizak & Co.
Buy this Portofino Hand-Wound Moon Phase, trade in your current watch, or sell us yours. Contact Bizak & Co. to make an offer or request a fair-market valuation.
Every watch is authenticated before delivery.
You're buying from genuine people, 30 years in business.
Every watch is checked by us before shipping.
Our five-year Bizak & Co. warranty covers manufacturing defects affecting mechanical operation under normal use, starting on delivery. It is separate from any remaining manufacturer warranty.
Exclusions include accidental damage, misuse, water damage, cosmetic damage, normal wear, loss and theft. Coverage and service availability for vintage or modified watches are confirmed in writing before purchase.
Read the full warranty terms and service instructions.
Eligible watches may be returned within 90 days for store credit. Brand-new watches and other exclusions are final sale.
U.S. overnight shipping is $100; international shipping is $500. Dispatch takes 2–3 business days after your wire clears. International transit times vary. Shipping details.
Read our reviews on Trustpilot
Great family business. They went out of their way to make my purchase go smoothly, they definitely earned my watch business!Read on Trustpilot ↗
Good seller. Honest familyRead on Trustpilot ↗
Honest family company. I’ve done business many times!Read on Trustpilot ↗
Trusted Seller, Definitely recommend for all watches purchase!Read on Trustpilot ↗
Trusted and honest seller. Deal with confidence.Read on Trustpilot ↗
Independent dealer. Not affiliated with, sponsored or authorized by the watch brands shown; all trademarks belong to their owners.