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Omega Jumbo, mid-century refinement
The Omega Jumbo 38mm (Ref. 2505-21) is a mid-century dress watch that reflects 1950s proportions with a generously sized steel case and an Art Deco-leaning dial layout. Its clean design — recessed small seconds, mixed Arabic numerals and an outer minute track — emphasizes legibility and restrained elegance. Powering the piece is the hand-wound Caliber 265, a member of the robust 30T2 family, finished with 15 jewels and long service pedigree. For a contemporary collector, this combination of period design, reliable movement architecture and documented recent servicing makes for a refined daily-wear vintage option.
Watch dossier
Important details, without the clutter.
01Specifications+
- Brand / model
- Omega Omega Jumbo 38mm Ref. 2505-21
- Reference
- 2505-21
- Estimated production
- Circa 1951
- Case material
- steel
- Case diameter
- 38 mm
- Lug-to-lug
- 45 mm
- Thickness
- 10 mm
- Dial
- refurbished
- Crystal
- acrylic
- Crown
- signed
- Strap / bracelet
- calf leather
- Movement
- manual
- Caliber
- 265
- Jewels
- 15
- Movement serial
- 1275••••
02Service & provenance+
Last serviced: 24 February 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