Introduced in the 1960s, 3-D Picture Books were a popular import from Japan. These books featured full-page photographs of the action utlizing poseable puppets, many bearing the large eyes popular in Asian children's fare as well as in contemporary American pop-art. The greatest allure of these books, though, were the 3-D lenticular placards attached to the front covers, (much like the 3-D postcards that were popular during the 1950s and 1960s produced by Vari-Vue.) Most of the illustrations were produced by Rose Art Studios, Shiba Productions, Tadasu Izawa and/or Shigemi Hijikata. Beginning in the 1970s, newer 3-D books and reprints of old favorites were printed without the 3-D placards, the cover art being replaced with the standard photographs that made up the interiors. Many of these books fetch a high price on the market today, specifically higher grade copies with the placards still attached, as these were often removed by the young owners.