HARBOUR LIGHTS LENS #631 - 5th Order FRESNEL LENSQuality Made in 2000 by HARBOUR LIGHTS for Younger & Associates, this is #631 in a series of collectible lighthouse lenses This lens is a replica of the "5th Order" large FRESNEL LENS. This replica is made of genuine glass & very realistic! (It weighs nearly 3 pounds!) This model has wheels on the base that actually rotate the lens. This is a special, limited edition #829 in a limited run of 4000. This measures 8" tall.