Omega Speedmaster Day-Date ref. 3521.30, original warranty card and books

The Omega Speedmaster ref. 3521.30 is a distinctive take on the classic Speedmaster, blending the familiar twisted-lug case and tachymeter bezel with a unique triple calendar, vertical chronograph layout, and day/night indicator. Introduced during the '90s, it represents a bold departure from the traditional "Moonwatch" lineage while retaining hallmark Speedmaster aesthetics. Powered by the robust Omega caliber 1150, based on the ETA 7751, it delivers automatic winding and useful complications within a balanced 39mm case. The watch is completed by a stainless steel bracelet that integrates seamlessly with the case for a sporty yet refined presence on the wrist.

This watch is overall in great pre-owned condition, showing normal signs of wear from use. Scratches and marks are present on the case, particularly on the bezel and lugs, but nothing that a light polish could not address. The bracelet remains in excellent condition, with surface scratches primarily visible on the polished links and a clasp that closes securely. There is a small speck of dirt visible on the dial beneath the ‘automatic’ text. The movement is running smoothly with all functions operating as intended. As the service history is unknown, we recommend a routine service for optimal timekeeping. Additional photos are available on request.

This watch comes with its original card holder, booklets, and international warranty card. It also includes two additional links.

Brand: Omega

Model: Speedmaster

Reference: 3521.30

Year: 1990s

Serial number: 564XXXXX

Case size: 39mm

Lug-to-lug: 44.5mm

Case thickness: 14mm

Case material: Stainless steel

Dial color: Silver

Movement: Omega caliber 1150

Functions: Chronograph, day, date, month, day/night indicator

Water resistance: 50 meters

Strap/bracelet: Stainless steel bracelet with adjustable folding clasp

Wrist size: 7” (with the two additional links, will fit a little under a 7.5” wrist)

Lug width: 18mm