How it was explained to me by an old-timer collector. That was the only way to get them. The box is probably harder to get because it was an accessory pack and the kids threw the Box away and added the pieces to their set.The ships appear to match the ones in Invasion Day Landing set. I only found one plane so far the Banshee F2H2, so I'm not sure where the other planes belong. This has been a three-year search and I've not yet found another set like it anywhere or information on it. It is complete 24 pieces you be the judge. The box has some interior restoration to preserve the Integrity of the box.
The box is very old and drying out. Any other questions I'll try to help. The item "Marx Miniature Play Set RARE MAIL ORDER ONLY Accessory Pack NAVY/AIR FORCE WithBox" is in sale since Thursday, February 18, 2021.This item is in the category "Toys & Hobbies\Vintage & Antique Toys\Play Sets". The seller is "oldskooldoneright" and is located in Mohnton, Pennsylvania. This item can be shipped to United States.