Omega Speedmaster Day-Date – reference 3520.50.00 (1998)

Heritage Narrative

The Speedmaster Day-Date, reference 3520.50.00, is often nicknamed the “Triple Date” for its full calendar complication. Introduced in the 1990s, it offered a unique blend of Speedmaster chronograph heritage and practical daily wear functions, including day, date, month, and 24-hour indications. With its 39 mm case, black tachymeter bezel, and balanced dial architecture, the 3520.50.00 became a versatile companion for collectors who value both technical complexity and iconic Omega design.

At its heart is the automatic calibre 1151, based on the Valjoux 7751, known for its robustness and reliable chronograph performance. This 1998 example remains in very good condition and comes complete with its original warranty card, box, and papers — a strong provenance that enhances both its collectability and long-term value.

Technical Specifications

Reference:
3520.50.00

Year:
1998

Movement:
Omega Calibre 1151, automatic, 25 jewels, ~42 h power reserve, based on Valjoux 7751

Functions:
Hours, minutes, chronograph (12 h), day, date, month, 24-hour indicator, small seconds

Case:
39 mm stainless steel, screw-down back, signed crown

Bezel:
Fixed black tachymeter bezel

Crystal:
Hesalite acrylic

Dial / Hands:
Black dial with luminous baton hour markers; white luminous hands; triple calendar layout

Bracelet / Clasp:
Omega stainless-steel bracelet with folding clasp

Water resistance:
30 m / 100 ft (factory rating)

Condition & Inclusions

Overall grade:
Very good—light, even surface wear; sharp case lines; dial and hands excellent.

Service status:
Newly serviced

Set:
Warranty card (1998), papers, Heritage Timepieces certificate of authenticity.

Shipping & Logistics

Stored off-site and shipped fully insured within 1–3 business days
Worldwide shipping available; buyer responsible for any import duties or taxes

Shipping & Returns

Complimentary insured worldwide shipping and a 14-day return window (watch must be returned in the same condition supplied). Every piece is authenticated, time-graphed, and prepared for secure transit.