The case matches one other unique watch, a link ref. 2498 with movement no. 966'360, case no. 663'403, with the calibre 12'''120 Q found in the ref. 1526 (with subsidiary seconds). That's why this example is known as the ref. 2497/2498. This is the kind of scholarship I think would go over really well to seasoned collectors today, but back in 2010, the watch net CHF 363,000. I think you could argue for replica breitling uhren twice that replica montblanc horloges or more today.