Omega Constellation Watch Case Back 198.0129 398.0858 Observatory Cal 1333

About this item

An original Omega Constellation snap-on case back in stainless steel, with the famous Geneva Observatory medallion (observatory dome under eight stars) at the centre. The inside is signed with the Omega Watch Co. triangle logo and "Acier Inoxydable", with the references 198.0129 and 398.0858, and the outside is stamped 1333. The 198.01xx Constellation quartz references of the late 1970s and 1980s use Omega's calibre 1333. A correct replacement part for restoring a Constellation of this reference.

Brand heritage

Omega launched the Constellation in 1952 to celebrate its chronometer precision records. The observatory medallion on the case back became the collection's signature and is one of the most recognised details in vintage watch collecting.

Why this one is special

• Genuine Omega part, signed inside with the Omega Watch Co. logo
• Iconic Constellation observatory medallion with eight stars
• Case references clearly engraved: 198.0129 / 398.0858
• Hard to find as a separate spare part for this exact reference

Specifications

• Brand: Omega
• Fits: Omega Constellation ref. 198.0129 / 398.0858
• Stamps: "Omega Watch Co.", "Acier Inoxydable", "198.0129", "398.0858" inside; "1333" outside
• Type: snap-on case back with observatory medallion
• Material: stainless steel
• Diameter: 31.8 mm (measured)
• Finish: brushed outside, perlage-style circular graining inside

Condition

Pre-owned with light surface scratches on the brushed outside, as normal for its age. The medallion is crisp and all engravings are clear. Please check all photos carefully as they are part of the description.

What's included

The case back only, as shown. No watch, movement, box or papers.

Shipping & Returns

$25 DHL Express shipping worldwide from Cairo, Egypt.
30-day returns, buyer pays return shipping.