Description
The Omega Speedmaster Mark 40 Triple Date 3520.50 is a collector’s gem — a rare and functional Speedmaster featuring Omega’s Caliber 1151 automatic chronograph with day, date, and month functions. This example was professionally serviced and pressure tested in April 2025 by an Omega-certified watchmaker and comes as a complete set: inner and outer box, cards, hang tag, full-size manual, and a 1-year mechanical warranty included.
View Omega’s Official Speedmaster Collection
Product Details:
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Brand & Model: Omega Speedmaster Mark 40 Triple Date
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Reference Number: 3520.50
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Year of Manufacture: Card Dated 2005
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Box & Papers: Yes – Includes inner/outer box(inner box shows typical wear), cards, hang tag, and full manual
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Warranty: 1-Year Mechanical Warranty (from date of sale)
Case & Dial:
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Case Material: Stainless Steel
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Case Width: 39mm (excluding crown)
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Case Length: 41mm lug-to-lug
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Thickness: 11mm
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Dial Color: Black with triple date layout
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Crystal: Sapphire
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Bezel: Stainless steel, fixed
Bracelet & Clasp:
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Bracelet Material: Omega Stainless Steel
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Bracelet Color: Black finish
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Clasp: Omega-signed folding clasp
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Wrist Size: Up to 7.5 inches
Movement & Performance:
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Movement: Omega Caliber 1151 (base Valjoux 7751)
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Functions: Time, Chronograph, Day, Date, Month
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Service: Full service & pressure test by Omega-certified watchmaker – April 2025
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Performance Metrics:
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Daily Rate: +3.9 seconds
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Amplitude: 270
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Beat Error: 0.2 ms
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Frequency: 28,800 bph
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Condition & Warranty:
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Working Condition: Excellent; recently serviced and performing within spec
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Cosmetic Condition: Very Good – light signs of wear consistent with age
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Warranty: Includes 1-year mechanical warranty from date of purchase
Why Buy This Watch?
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Rare Speedmaster variant with complete triple calendar
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Recent full service in April 2025 by Omega-certified watchmaker
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Full set with boxes, cards, manual, and tag — ideal for collectors
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Reliable Omega Caliber 1151 automatic movement
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Backed by 1-year warranty
