1972 Omega Automatic Watch 166.0120 Day/Date Cal. 1020 35mm 17 Jewels ALL S.S.

Watch Overview

Offered here is a collectible vintage Omega automatic wristwatch, reference 166.0120, dating to 1972 based on the movement serial number.

It is a self-winding watch powered by the original Omega Caliber 1020 automatic movement, featuring 17 jewels, a sweep seconds hand, and a day-date display with quick-set. This Swiss-made timepiece operates at a frequency of 28,800 vph, and offers an approx. 42 hours of power reserve.

The watch features a silver dial accented by applied baton hour markers, minute/second track, matching hands, and a day-date window positioned at 3 o’clock.

Housed in a 35mm stainless steel tonneau-style case with a fixed bezel and signed Omega crown. It is fitted with the original Omega stainless steel bracelet.

Fully inspected and authenticated, the watch remains in very good vintage condition consistent with its age and is ready to wear and enjoy.

Product Details

General Specifications

• Brand: Omega
• Type: Wristwatch
• Model: Automatic
• Reference: 166.0120
• Year / Era: 1972 - Vintage
• Gender: Men's
• Country of Manufacture: Switzerland

Dial & Display

• Display: Analog
• Color: Silver-tone
• Features: Baton hour markers, minute/second track, sweep-seconds hand, day/date indicator

Movement

• Type: Self-winding
• Caliber: Omega 1020
• Jewels: 17
• Movement Functions:
  • Sweep seconds
  • Day/date window with quick-set
  • Movement SN 34352280
• Power Reserve: Approx. 42 hours
• Frequency: 28,800 vph

Case & Band

• Material: Stainless Steel
• Case Shape: Tonneau/Barrel
• Bezel: Fixed, smooth
• Back: Screw-back
• Crown: Signed, pull-push
• Band Type: Stainless steel bracelet
• Max Wrist Size: Approx. 7 3/4" (19.7cm)
• Case Back Markings: Omega Watch Co. Fab. Suisse Swiss Made Acier Inoxydable 166.0120

Case Measurements (mm)

• Case Size: 35
• Case Diameter w/Crown: 37.2
• Case Lug to Lug: 42
• Case Thickness: 12.5
• Lug Width: 18
• Band Width: 22

Additional Info

• Box & Papers: NO
• Condition: The watch is in good condition, showing signs of wear consistent with age and use
• Notes: This timepiece has been fully inspected and authenticated by our in-house watchmaker, confirming that it runs accurately.

About Second Hand Horology

At SECOND HAND HOROLOGY, we offer a curated selection of watches ranging from vintage to modern, including both brand-new and pre-owned timepieces. We’re committed to quality, accuracy, and integrity. Our listings feature:

Professional, unedited photography and clear, transparent descriptions. Every watch is thoroughly inspected and securely packaged to ensure a confident, seamless buying experience.

We also warmly invite you to visit our physical shop and explore the collection in person.

Contact Us

We appreciate you checking out our listing! Don’t hesitate to reach out with questions, offers, or just to talk watches — we love what we do and enjoy connecting with fellow enthusiasts.

Thank you for your business—we truly appreciate your support and look forward to serving you again in the future!

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