Much discussion and confusion occur over dating and identifying Omega Constellation dials of various periods. Recently, Ive received numerous emails from Omega afficionados and indeed neophytes with queries about the authenticity of dials.
Ive composed a longish and detailed piece on dials, and while it could never be the Last Word on the subject, it goes some way to establish some benchmarks on identifying authentic dials.
This is the first of a series of three posts I'll devote to dials, cases and movements. Ive have since updated the article as a consequence of some very interesting conversations of the on-line watch forums
This article has been updated and now appears in another post
Poscript: Its difficult to put a definitive percentage on the rate of devaluation caused by dial refinishing, and thats why I suggest "up to 40% decline in value" with a re-dial. The oft-quoted figure in watch and collectors magazines is 30 -40 percent. I thought I'd test that by taking samples from the auction records of antiquorum in Hong Kong, Tokyo, London and Milan and comparing like with like. I had a work experience student do the leg work. In some high-end marques where originality is king, it can be more than 40%. In upper-middle end brands the discount ranges from around 20 - 40 percent.
Note that I also specify which markets and leave eBay out of it because eBay is an unregulated and often uninformed buying market, and it's often when buyers go to re-sell a watch that they have difficulty is recouping their investment, particularly if the dial is refinished.