Used to have this BP Leman that uses the same sort of big date system found in the ALS and Breguet shown above. At least the BP had a leading "0" on days 1-9, which is something that drives me nuts on the L1 to be honest - I can get past the window "mullion" they add to disguise the differing levels of the 2 date disks, but lack of a leading zero and the unbalanced look it gives to the watch, that is a deal breaker for me personally. Sold it because it was just not getting enough wrist time. I can't say that was because of the big date system specifically, but I'm sure it was part of it. GO does the best big date as far as I'm concerned: And the big date in action... Cheers, Al