IWC Calatrava Ref.1818 C.8541B 35.0mm 1975

With barely any other examples of this watch up for sale, this extremely collectible IWC Calatrava Ref.1818 with a sunburst dial is the perfect classy watch every collector needs. Powered by the legendary C.8541B Pellaton winding movement, the watch runs at an excellent rate and is ready to be worn at the fanciest of events.

Well balanced at 35.0mm in diameter and sporting a sleek high polished stainless steel case, this IWC gives the perfect elegant silhouette thats just the right size to not be overbearing on the wrist.

DIAL

• Original white sunburst dial in excellent preserved condition with light natural patina

• “International Watch Co. Schaffhausen” printed at 12 o’clock

• Steel Syringe hands with black inserts, perfectly matching numerals

• Date window at 3 o’clock, framed in Steel

• No luminous material, consistent with the era's design preferences

CASE

• Stainless steel case in excellent condition, professionally polished while retaining sharp edges

• 35.0mm diameter / 42.0mm lug-to-lug / 10.1mm thickness

• Original IWC fish-signed crown at 3 o’clock, indicating water resistance matching standards of the time

CASEBACK

• Snap-on caseback, consistent with vintage IWC designs

• Serial number engraving at 6 o’clock, legible upon close inspection

MOVEMENT

• IWC Caliber 8541B – Automatic

• 25 jewels / 42-hr power reserve / 19,800vph

• Features IWC's patented Pellaton winding system, known for its efficiency and durability. Freshly serviced before sale

• Last Service: November 2025

• Accuracy: ~0s/day

STRAP

• Handmade Black Crocodile leather strap, 18.0mm lug width

• Aftermarket stainless steel IWC buckle

AFTERCARE PACKAGE

• Comes with a black wooden box + silica gel

• Free PolyWatch kit (for acrylic crystal only)

• 1-month warranty (non-user damage)

• Warranty card included with service history details

• Exclusive repair service post-warranty

• 7-day return policy for peace of mind

SPECIFICS

Maker: IWC

Model: Calatrava

Reference: 1818

Case Material: Stainless Steel

Year: 1975

Case Serial Number: 2186242

Movement Serial Number: 2126351

Caliber: IWC C8541B

Movement Type: Automatic

Power Reserve: 42 hours

Accuracy: ~0s/day

Diameter: 35.0mm

Lug to Lug: 42.0mm

Thickness: 10.1mm

Lume: None

Strap:Handmade Black Crocodile Leather Strap

Buckle: Aftermarket IWC stamped buckle

Box and papers: NIL

Crystal: Original IWC Domed Acrylic

Crown: Original IWC fish-signed crown

Last Service: November 2025

Free tracked international shipping via SingPost. Delivery within Singapore in 2–3 working days. International shipping may take 4–16 working days depending on destination. Do note respective custom duties might apply which includes the recent US tariffs.

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

This is a vintage timepiece, due to its age water resistance is not guaranteed. Please avoid exposing the watch to water as much as possible. Store the watch with dry tissue or silica gel packets provided to preserve its condition. We are not liable for water damage post-purchase.