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Tonneau Seamaster with Calibre 562
This Omega Seamaster Automatic Ref. 166.042 presents a distinctive square tonneau steel case and an original blue dial with radial block markers and framed date at 3, a styling cue typical of late 1960s–1970s design. Its automatic Caliber 562, a 24-jewel movement from Omega’s 550 family, underpins the watch with proven technical pedigree. With documented service in March 2026 and a clear movement serial, this piece offers a coherent narrative for collectors who appreciate unusual Seamaster silhouettes married to a respected mid‑century automatic movement.
Watch dossier
Important details, without the clutter.
01Specifications+
- Brand / model
- Omega Omega Automatic Seamaster Ref. 166.042
- Reference
- 166.042
- Estimated production
- Circa 1970
- Case material
- Steel
- Case diameter
- 33 mm
- Lug-to-lug
- 41 mm
- Thickness
- 10 mm
- Dial
- original
- Crystal
- signed acrylic
- Crown
- signed
- Strap / bracelet
- calf leather
- Movement
- automatic
- Caliber
- 562
- Jewels
- 24
- Movement serial
- 2093••••
02Service & provenance+
Last serviced: 05 March 2026
The service includes the following operations: • Disassembly of the watch • Movement overhaul: dismantling • Cleaning, reassembly and lubrication • Use of Moebius synthetic oils • Ultrasonic cleaning of the case • Reassembly of the case and the watch • Final technical and aesthetic checks
03Delivery & returns+
Current store policies apply to this purchase.
Included with the watch