Here we have a good example of a 1968 Omega Constellation Chronometer in an 18ct gold case. It is the reference 168.018 with the case having the poincon de maitre 352 for Serva SA. It has a well sized 35mm case with the bezel having the satin brushed sunburst finish. The screw back has the well-defined Observatory motif. The dial is a silver tone with the satin brushed finish. It has applied gold tone door stop hour markers with the black painted centre. They have the aged luminous plots to the base. The Omega logo is applied below 12, with the Chronometer signing and Constellation name. The date window has the facetted surround to the right. It has the original Omega signed crown. Inside it has the Swiss hallmarking for 18ct gold. The movement is an Omega calibre 564, Chronometer grade which is keeping time to within +10 seconds variation a day.
 
The dial has the silver satin base tone, with the linear brushed finish. It has well sized gold tone baton doorstop hour markers. They have the polished finish with the bevel to either end. They have the black painted finish to the flat face which is good and without wear. To the base of the markers are the aged Tritium luminous plots. In-between it has large dash markers for the minutes and seconds. The date window is at 3 O’clock with the facetted surrounded. The date wheel has a silver finish with the black Arabic numerals. Below 12 is the applied Omega logo, with the Chronometer signing. It has the ‘Constellation’ model signing and applied star, above 6 O’clock.
The hour and minute hands are of stick style, in a polished gold tone. They have the black painted stripe matching the hour markers. It has a small luminous in-fill to the edge. The central second hand is original with the neat, tapered design. These are all protected by the original Omega crystal with the etched logo to the centre.
 
The case is well proportioned measuring 35mm wide. It has a lug-to-lug length of 40.25mm and a lug width of 19mm, which make it a well sized vintage watch. It sits comfortably on the wrist with a sleek profile and depth of 10mm.
The case is very well crafted in 18ct having been manufactured by Serva SA. The bezel is a standout aspect with the satin brushed sunburst finish. It sits proudly, framing the dial. It has the polished bevel to the edge which caps it nicely, reflecting the light. The case has the straight downward turned lug design. The lugs have the polished finish, as do the sides and rear of the case. To the right, there is the original crown with the Omega logo. The case back screws into place and is in good condition with some light marking. It has the Observatory motif to the centre, which is well defined. Inside it has the Omega signing, with the Swiss hallmarking for 18ct gold. It has the poincon de maitre 352 for Serva S.A. It is marked with the reference 168.018.
Inside it has the Omega calibre 564 movement, which is chronometer grade, being adjusted to 5 positions and temperature. It has the classic rose gold tone finish, which is in good condition. The movement has been recently serviced. It’s keeping time to within +10 seconds a day, with an amplitude of 260 degrees and a beat error of 0.4m/s.
It comes on a new genuine Omega leather strap, reference 98000090, which will fit and wrist size.
 
Full condition report below. Please see the images as these compliment and aid the description provided below.
 
Dial: 
The dial is original and is in good condition. It is a silver tone with the brushed satin finish. The applied hour markers are good, without corrosion, as is the date window and applied Omega logo. The signing is good and clear, without wear. There are some slight marks to the dial. The lume plots are good and original in an aged tone.
 
Hands: 
The hands are original in a polished gold tone. It has the black painted section to the centre, with luminous in-fill near the tip. They are in good condition with only light marking.
 
Glass: 
The acrylic crystal is original with Omega etching to the centre. It has some light marks associated with age.
 
Crown: 
The Omega crown is original, and the logo is good and clear. 
 
Case:
The case is formed of 18ct gold and is in good condition for the age. It has the satin brushed sunburst finish to the bezel with a polished bevel to the edge. It has the polished finish to the rest of the case. It has light scratching and some nicks to the edge of the lugs associated with ageing. Hallmarks to the rear of the case are good and clear.
 
Caseback:
The case back is formed of 18ct gold and is a screw back. It is in good original condition with the polished finish. It has the engraved observatory to the centre which is very good and well defined. It has some light marking associated with age and poor opening.
 
Strap: 
The watch comes on a new 19mm omega leather strap which is in brand new condition. It has a non-omega gold plated buckle.
 
Movement: 
The movement is an Omega calibre 564. It is automatic with a jewel count of 24. It has a 50-hour power reserve with a frequency of 19,800 BPH. It is chronometer grade, with the quickset date function.
The movement has been recently serviced. It’s keeping time to within +10 seconds a day, with an amplitude of 260 degrees and a beat error of 0.4m/s.
 
Case dimensions:
Case width: 35mm
Case width with crown: 37mm 
Case length: 35mm 
Case length lug to lug: 40.25mm
Case Depth: 10mm
Lug width: 19mm