interesting i just noticed the ALS does not have the Tachymeter scale at all.
im not saying ill ever use it, but it is a significant part of a chronographs appeal and functionality, i find its absence leaves me wanting.
Lets suppose im on the assembly line and i need to know how many teddy bears are being made per hour?
The ALS would do me no good...the Patek would come through in the clutch.
Ps i just had to double check, the datograph has the tach scale...whew!