Authentic, early Heintz adjustable folding book rack.  Signed "Sterling" in small letters stamped in the lower left corner of each end plate, along the bottom of the floral overlay in front of the bronze copper-colored / highlighted background that has a nice "japanned" look.  Fully functional, with its original patina and historical wear.  About 5 and 3/4 inches wide by 14 inches long when not extended, expanding out to just over 22 inches maximum.  The two opposing metal sterling and bronze endplates are each about 6 inches tall by about 5 and 1/2 inches wide.  Wood frame appears to be oak with some visible quartering.  

Please ask questions before bidding.  All sales are final.  Please review the photos carefully, including at close-up magnification.  Selling from my diverse personal collection - be sure to check out my other listings.  Thanks for your interest.