Such a finish is carefully needed for a clean, simple dial - I can understand why it is alluring! My only personal reservation is I like to have running seconds...but that's just me
From observing the movement side of the Sax thin, I'm fairly certain its a single barrel as can be traced out from the location of the jewels on the movement geartrain...
Additionally, movements with two barrels like the Lange 1 advertises this fact with "Doppelfederhaus" printed on the dial.
Regards,
skyeriding