Welding auto-darkening filter

FIG. 1 is a perspective view of a welding auto-darkening filter showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

In the drawings, the broken lines shown in FIGS. 1-4 depict portions of the design that form no part of the claim.

The ornamental design for welding auto-darkening filter, as shown and described.

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