Vintage Mid-Century Czechoslovakian Barrister Bookcase

Interesting 4 piece stacking bookcase, on legs. Brackets were added to keep each piece stacked with better stability (each bookcase unit is separate). They have sliding glass doors & are Czech made (labeled on the backside, which we can't make out).  Each unit has sliding glass doors - the door on the bottom unit is very tight & hard to close. The top unit has a strip of veneer missing on the edge of one side & there are a few pieces of wood-looking tape near the bottom unit.  The top has a large scratch on it.

Dimensions:  57 7/8"T  x  39 5/8"W  x  9 1/4"D. Each unit is 12 1/2"T.