Edradour 1999 / 10 Year Old / Un-chillfiltered

A curious Edradour 10yo, bottled by independent bottler Signatory - who own Edradour. We're not sure why they've chosen to bottle this as part of the Un-Chillfiltered collection instead of as an official bottling (answers on a postcard). Nonetheless, it looks interesting - there's no info on the cask type, but at this colour for a 10yo, and with 908 bottles, we're guessing this might be from a sherry butt.