The Paper Kites - This here is a Sigma DM-15 acoustic guitar - it was the only acoustic we used to record 'On The Train Ride Home' and I really love it.
Sigma dm-15 - YouTube
SIGMA GUITARS DM-15 Acoustic Guitar
Sigma DM-15 Acoustic, Solid Mahogany at Gear4music
Review of the Sigma DM-15 guitar. Features and Specs
Sigma SDM-15 Acoustic Demo - YouTube
Sigma Guitare acoustique, Acajou massif DM-15+ - La Boîte Musicale