This is a very nice example of a Sky Blue Schwinn sparkle combo lock. The case is clean without any issues. There are no cracks or dirt or haze not even scuffed. It is also supple and the color is strong. Chain and metal shows no corrosion.
Evidently kept sealed in zip loc during long storage because it's like new. It hasn't been sprayed with. Anything, and I advise against it unless you know something I don't know. And never use silicon products. On anything you care about.I mean soft soft, unoxidized. I know what this plastic feels like when it hasn't become oxidized. I believe this is an early Summit-Schwinn collaboration due to lock having knurled dials. As presented on combo card diagram. Later, the design seems to change to gear tumbler dials.
Though the Schwinn card diagram remains with the knurled dial depiction throughout production. There are some oil stains on the card with the matching combination. This will be fully insured, priority box, usually sent same or next day.