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Post-war Jumbo in steel — refined presence
This post‑war Omega Jumbo from circa 1947 presents a strikingly large 38.5 mm steel case and clean, transitional late‑1940s lines. The professionally refurbished dial and period‑correct acrylic crystal retain the era’s character while improving legibility. At its heart sits Omega’s 30mm family caliber 265, a manually wound movement with 15 jewels, known for dependable performance. Recently serviced, the watch combines historical construction with practical readiness, making it an appealing choice for collectors who value classical mid‑century design paired with trustworthy mechanical engineering.
Watch dossier
Important details, without the clutter.
01Specifications+
- Brand / model
- Omega Omega Jumbo 38.5 mm Ref. 2505-6
- Reference
- 2505-6
- Estimated production
- Circa 1947 (verified from internal movement serial tables)
- Case material
- steel
- Case diameter
- 38.5 mm
- Lug-to-lug
- 47 mm
- Thickness
- 9 mm
- Dial
- refurbished
- Crystal
- acrylic
- Crown
- signed
- Strap / bracelet
- calf leather
- Movement
- manual
- Caliber
- 265
- Jewels
- 15
- Movement serial
- 1170••••
02Service & provenance+
Last serviced: 07 April 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