Sinn 104 vs IWC Pilot's Watch Mark XVIII

Both are pilot watches. In short: the Sinn 104 takes more water (200m) — the one to pick if you swim or dive. The Sinn 104 is automatic, 200m water resistance, 41mm, sapphire crystal; the IWC Pilot's Watch Mark XVIII is automatic, 50m water resistance, 40mm, sapphire crystal.

Last verified 2026-06-27 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

Spec	Sinn 104	IWC Pilot's Watch Mark XVIII
Movement	Automatic	Automatic
Water resistance	200m	50m
Case size	41mm	40mm
Crystal	sapphire	sapphire
Style	Pilot / aviation	Pilot / aviation
Price tier	Upper	Premium

Which should you buy?

The Sinn 104 takes more water (200m) — the one to pick if you swim or dive
The Sinn 104 sits in the lower price tier (Upper) if budget leads

Where to buy

Sinn 104See price on AmazonCheck price

IWC Pilot's Watch Mark XVIIISee price on AmazonCheck price

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FAQ

What's the difference between the Sinn 104 and the IWC Pilot's Watch Mark XVIII?
Both are pilot watches. The Sinn 104 is automatic, 200m water resistance, 41mm, sapphire crystal; the IWC Pilot's Watch Mark XVIII is automatic, 50m water resistance, 40mm, sapphire crystal.

Which has better water resistance, the Sinn 104 or the IWC Pilot's Watch Mark XVIII?
The Sinn 104, rated 200m, versus 50m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Sinn 104 or the IWC Pilot's Watch Mark XVIII?
The Sinn 104 is the lower-priced tier; the other steps up in build for more money — confirm both live prices at the retailer.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-27. Copy a ready-made reference:

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