Updated: April 04, 2024

Here is an original hollow boulder with internal steel reinforcements, used on the Lost in Space sets as well as other Irwin Allen productions. The still photo used here from Lost in Space is from the third season's episode "The Anti-Matter-Man" which originally aired on CBS December 27, 1967. The photo clearly shows the markings and design of this boulder. The prop measures approx. 4 feet in diameter.

Value: $1,500.