It is made of metal. I saw a picture of one on craigslist, but it didn't say if it was from the 50's

 

logo Im Trying To Find Out If The Old Sheet Press/ironing Board I Have Is Worth Anything.  It Is From The 1950s
1 PC Cast Iron Steak Bacon Press Weight Weighter NEW FREE SHIPPING
1 PC Cast Iron Steak Bacon Press Weight Weighter NEW FREE SHIPPING
Paypal   US $17.29
New Tools of the Trade Basics Square Grill Cast Iron Pan 10 with Panini Press
New Tools of the Trade Basics Square Grill Cast Iron Pan 10 with Panini Press
Paypal   US $27.99
Cast Iron Grill Bacon Press cook in less time
Cast Iron Grill Bacon Press cook in less time
Paypal   US $13.33