Just saw the new schedule with #35 Moose, checked the pics...
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...and remembered about my White Owl of the same bone style and color. I took it out to tote and was I astonished to find it discolored heavily! Here's pictures of then:
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and now:
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I only carried it a couple of times, in a leather slip. Could it be that chemicals in leather caused the discoloration? Though I don't understand why it happened also in the depth of the jigging grooves. They definitely weren't in contact with anything physically...