Vintage Marx International Jet Port #6026 American Airlines With Box Sears Rare

This is a vintage Marx International Jet Port #6026 featuring American Airlines planes. The box is a Sears Roebuck and Co. This set seems to be quite rare- I wasn't able to find this specific number listed.

I was thinking it might be a special set made for Sears? Please look carefully at all the pieces- I wasn't able to find the list of parts for the set, but it appears most are included. A few have signs of age, dirtiness or minor damage. Box is quite damaged with some dirtiness.

Was likely stored in a garage. Hope someone can enjoy this unique Marx Set!