
...from 5960 and 5980. IMHO, the latter are meant to be "mass" produced. 5131 is not and can't be. Its enamel dial is very difficult to make. Although we see more 5131s showing up now, I doubt in the end there will be many in total.
So I want to congratulate every 5131G/J owner for getting this rare and (subjectively) beautiful piece.
That said, I share exactly the same opinions as Nicolas commented on the 5131, and to be honest, overall I don't like this watch. I recall when 5131 was just announced, a few friends of mine had the same instant reactions. None of us liked the font on the dial nor the engraving on the bezel. That, to me, killed the watch.
Of all the modern Patek world timers, my favorite is 5110P, though it is not perfect either.
To me, the perfect Patek world timers, with or without enamel dial, are 1415 and 2523.