I'm with Brook - I thought the Deci scale 2-reg watch he got for $2.2k was closer to being a bargain than being a strong price for that watch! I don't see much discrepancy between 2 and 3 dials now; in fact my spreadsheet of known sales tells me 3647s are outperforming 2447s so far this year.

I'm not sure the "discount" for 2 registers over 3 has ever been that pronounced over on this side of the pond, it might be one of those quirks by location. And perhaps my viewpoint is slightly coloured by having always been a fan of the 2 regs - it was something Chuck and I agreed to disagree upon! I definitely still see gold-plated watches at a discount to steel, but number of registers in first gen Carreras not so much. How about the followers of the other models, is it something you see there?