The beauty and sound created by this beauty will leave anyone who hears her in complete awe. I decided to play Romance to discover the grandeur and unleash the power and beauty in the sound and feel of this Alpine spruce top babe. OUTSTANDING!  ! 
The bass has a presence that responds fast and easily to the player's attack and the trebles stand out with clarity and a masterful separation in each single voice. Rich and crispy overtones add life to the unequaled voice of this concert Masterpiece.
The 92 years air dried Brazilian rosewood matched by the most beautiful Ebony bindings and French marquetry, will keep you staring at her for long stretches of time. You'll never get tired of playing and admiring her beauty. I felt like a better player from note 1 and that is the signature of a Masterwork instrument. 640 radiused action and a great response will make you feel like you had been suffering for nothing on whatever guitar you have been playing to this day... A++

640mm or 650 mm?
Regarding 650mm or 640 mm guitar construction, keep the following rule at hand: If the distance between the tip of your thumb and the tip of your little finger is equal or less than 9 in. when fully stretched, use 640 mm. Adapting from one scale to the other takes no adaptation
.