1968 Martin D-35
This guitar is my favorite. It has the thinest neck (front to back) I've ever seen on a Martin D-series guitar. The neck is consequently very light, and (I would speculate) may slightly weaken the sound quality. However, it makes the instrument very easy to play. When new, it was a little dead-sounding, but the sound quality has improved dramatically with age.
The dog is Pegleg (Peg for short), our Jack Russell terrier. She's up for adoption.