End there we goo again,10% difference in price between 2915-3 and 2998-1 isn't correct,2915-3 have oval"O" dial and lieave to be rare and expensive part in original watch, and last sell watch 2915-3 for $80,000+ is 40% more than price for collectors grade watch in price chart.
The price chart reflects actual trades, not perceived values. It does not say what watches
ought to trade for. This does mean that a price can go along without change - because there has not been an actual trade to report and therefore change it.
So I do not disagree that a 2915-3 might sell for more than the price chart figure (that reflects previous trades), shows. It just has not yet, the Christies watch not withstanding.
The 2915-3 sold by Christies, was exceptional. I know the watch and I know the seller. (Interestingly he genuinely expected it to sell for more, and was disappointed in the result). It was an outlier, in far better condition that any 2915-3 I have seen elsewhere, in a collection or on offer. It (rightly) went for more than double any other 2915-3 trade I know of. To adjust the price upward to reflect this single trade would not be helpful. However I did report that very trade in the price chart notes.
It is only intended as a guide. The rare 2915's are included but you must take those prices under advisement, in the knowledge that they are very rare, the trades numbering less than 10 a year, often with terrible omissions or problems.
I think anyone buying a 2915 will have the confidence to ignore what I write and they will buy based on desire and what they can afford.
As I keep saying, the chart is only as good as the observations I make, and the kindness of collectors who share their stories with me.
As yet, no collector has shared a trade of a 2915-3 for more than $40,000 and most have been under 25,000. As soon as they do, the chart will reflect it.
One last philosophical point. Just because a 2915-3 is rarer than a 2998-1 does that make it more valuable? I would argue there are more potential buyers of a 2998 that a 2915. Rarity does not dictate value, sometimes something is too rare to have a strong following.