I have an old Schott pearwood "Concert" alto which may be the same as what Mo has. Its tuning is ok and it's loud, but its tone is crude and nasty. Old wooden Dolmetsches are usually the same, even expensive ones. The straight-edged labium is the giveaway - a curved windway usually makes for a more interesting sound. Dolmetsch claimed to be following the early 18th century designs of Bressan, but ignored that very important detail. The Zen-On plastic "Bressan" gets it right for a fraction of the cost of a handmade Dolmetsch.