IWC IWC - IW3878-04 Pilot's Watch Spitfire Chronograph Bracelet

Pilot's Watch Spitfire Chronograph Bracelet

REF. IW3878-04

4/10

Uncommon

Case

MaterialStainless Steel

Diameter43 mm

ShapeRound

CrystalSapphire

Case backClosed

Water resistance60 m

Dial

ColourGrey Indexes: Arabic Numerals

IndexesArabic Numerals

Movement

Caliber89365

Typeautomatic

Reserve68 h

Explore caliber→

In Context

At 43 mm it is a large watch — well above this catalogue’s 40 mm median, and enough to dominate a narrow wrist. At 15.5 mm it is a tall case, and it will catch on a cuff. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 60 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement winds itself from the motion of your wrist. 68 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

IW3878-04 is one of 10 executions of the IW3878 base reference. Underneath they are the same watch; what separates this one is a stainless steel case. Beyond the time it carries a chronograph.

The IW3878 family

IW3878-04 is one of 10 variants sharing the IW3878 base reference — same watch underneath, different dial, bezel, or bracelet execution. Browse the others:

IWC

Grey · Stainless Steel

IW3878-02 · 43 mm

IWC

Grey · Red Gold

IW3878-03 · 43 mm

IWC

Brown · Red Gold

IW3878-05 · 43 mm

IWC

Brown · Stainless Steel

IW3878-06 · 43 mm

IWC

Brown · Stainless Steel

IW3878-08 · 43 mm

IWC

Silver · Stainless Steel

IW3878-09 · 43 mm

IWC

Grey · Stainless Steel

IW3878-10 · 43 mm

IWC

Grey · Red Gold

IW3878-11 · 43 mm

+ 1 more variant in this family.

Inside: Caliber 89365

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An 89000-family chronograph with a column wheel and an integrated vertical clutch, so the chronograph hand starts without the flinch a lateral coupling gives. Flyback actuation resets and restarts the timing in a single press. It differs from the 89361 in the counter layout: the 89365 registers elapsed minutes only, where the 89361 combines hours and minutes on one subdial. Four winding pawls in paired arrangement feed the barrel.

17 other watches in the library run the IWC 89365.

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