Portugieser Automatic 42

The IWC Portugieser Automatic 42 traces its roots to the late 1930s, when IWC answered the request of two Portuguese businessmen for a wristwatch with marine chronometer precision. Today’s 42.3mm version pays tribute to that original spirit, blending clean, legible design with modern proportions and the in-house Caliber 52010 automatic movement, known for its impressive seven-day power reserve. This makes it a compelling option for collectors attracted to both the model’s historical significance and its technical refinement.

Current references like the IW5007 and IW500705 are most sought after for their balanced dial layout—featuring a date at six, running seconds at nine, and power reserve at three—plus the signature feuille hands and applied numerals. Variants differ mainly in dial color (silver, blue, black) and case material, with steel models commanding more accessible prices than their gold counterparts. Limited editions or boutique exclusives can carry a premium, especially if they feature unique dials or casebacks.

When evaluating a Portugieser Automatic 42, condition of the case and clarity of the sapphire crystal are key, as the watch’s polished surfaces and display back can show wear. Confirming the correct movement and original buckle or deployant clasp helps maintain value. Water resistance is rated at 30 meters—adequate for daily wear, but not intended for swimming. The seven-day automatic movement is a standout, making this model a practical and collectible choice within IWC’s lineup.