Baby calculator

From: kentuckybirdlady
Email: yayaredmax@yahoo.com


Who can give me more background info on my little prize? It's a BABY CALCULATOR hand held with stylus and pull-up metal handle. It has 9 columns and at the bottom says ADD SUBTRACT MULTIPLY DIVIDE Glenview, Illinois USA Trademark reg US Pat. Off. Nothing on the back which appears to be brown plastic; front is silver metal. Comes in a red-brown plastic snap front case/envelope. I think it is form the 1920's/30's but can't find much about it.