Lionel/American Flyer # 6-48238 S Scale Depressed Center Flat car with Cable Load lettered for GE. This car was built for NASG members and is not available on their web site:(NASG.ORG)
It is probably sold out. 
This item is in the Original Box packed in the original shipping carton and is MINT C10. The OB is Excellent with some rubs.
This is very rare and may be the only 1 available for sale.

Thanks for looking & Good Luck!!