This is a single collectible postcard from Boomerang Media Cards, featuring an intriguing optical illusion design. The front of the postcard displays the title "THE 10 COMMANDMENTS: MOSES: MOUNT SINAI, EXODUS. CHAPTER 20" along with instructions to "CONCENTRATE ON THE CENTRAL WHITE & BLACK IMAGE FOR 20 SECS, THEN CLOSE YOUR EYES TO REVEAL THE HIDDEN IMAGE." The artwork presents an abstract, fiery background with various symbols and a central high-contrast image intended for the illusion.

The reverse side of the postcard indicates it is part of a collectible series, stating "Collect all '10', released fortnightly to make the bigger picture." It also features a smaller collage-style image, the Boomerang Media Cards branding, and a "NOT FOR SALE" mark, suggesting it was a promotional item. This unique postcard is an excellent addition for collectors of non-topographical postcards, optical illusion art, or religious-themed ephemera.

Verified Specifications:
Brand/Maker: Boomerang Media Cards
Item Type: Postcard
Era/Style: Contemporary Art, Optical Illusion, Abstract
Material: Card (Paper)
Theme: Religious, Optical Illusion, Collectible Series
Features: "NOT FOR SALE" mark, Collectible Series of 10, Illusion instructions
Included Components: Single postcard, as pictured
Country of Origin: Not specified (Boomerang Media Cards is a UK-based company but origin not printed)
Lot Count: 1