Found these along with a few other Nylint papers in a truck at a flee market.  I have a few of them but that's it.  All the parts and direction sheet for the Michigan Shovel came in these envelopes when the cranes where put in the box.  They carried the pins and cable to assemble the crane, along with the directions sheet for assembly and usage. Pretty cool find. The condition is really nice with bright graphics.

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