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The ornamental design for a swim fin, as shown and described. |
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FIG. 1 is a top perspective view of my swim fin;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a side cross-sectional view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a left side elevational view thereof with the right side elevational view being a mirror image thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a rear view thereof.
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