Shoulder Rest for a Violin or Viola

FIG. 1 is an upper perspective view of a shoulder rest for a violin or viola in accordance with our design. FIG. 2 is a first side view thereof. FIG. 3 is a lower perspective view thereof. FIG. 4 is a top view thereof. FIG. 5 is a front view thereof. FIG. 6 is a bottom view thereof. FIG. 7 is another upper perspective view thereof. FIG. 8 is a second side view thereof; and, FIG. 9 is another lower perspective view thereof. The broken lines represent portions of the shoulder rest for a violin or viola that form no part of the claimed design.