You can see a picture of the box if you do a search. The playset was much like the Marx set, but the mountain was in black. This has been in my collection for a long time, but now it can be in yours, a piece of playset history.
The item "MARX/MEGO Original oil painting GUNS of NAVARONE Playset by Uldis Klavins" is in sale since Monday, June 19, 2017. This item is in the category "Toys & Hobbies\Vintage & Antique Toys\Play Sets".
The seller is "heartbreaker28" and is located in Anaheim, California. This item can be shipped to United States.