For jazz guitarist Mark Solomon, co-owner of The Billable Hour in Ardsley, N.Y, which makes special clocks for people who bill by the hour

For jazz guitarist Mark Solomon, co-owner of The Billable Hour in Ardsley, N.Y, which makes special clocks for people who bill by the hour, the Holy Grail is a Mark Elf Custom Classic Guitar by DeCava Guitars in Stratford, Conn. “It sounds gorgeous, it looks great, and it plays easy.” The acoustic archtop guitar is $8,000 through decava.com.