I would trade the J for a R iteration which I find the most beautiful of the four metals, but in any case I would stick to 3940 the absolutely perfect daily wearer pc
but the 5140 is more legible. I sold my 5940 because it was not legible. I find perpetual calendars like the 5320 and 5159 more legible as one can see all the information at a glance.
As I am not a big fan of the brownish indicator for day and night on the 3940. However the size of the 3940 is better IMO. Let us know what you go for. I am very very hesitant in getting a 5140 at the moment. Kev
Unless you strongly feel the 3940 is too small, or there are condition differences between the two, I'd stick with what you have. That said, if I was choosing and had neither, I would get the 5140. Cheers, John
While I absolutely admire the 5140 the 3940 has the most classic proportions. If you can afford it, you can find a 5140 for a decent price these days. Good luck! Peter