ANTIQUE ORIGINAL WORKING BAROGRAPH w/CRYSTAL GLASS F. DESCRIPTION: Offered to you is this 19th Century antique original barograph NAUMANN, with crystal glass, working. For condition see photos. Scarce and highly collectable item. Thank you for your patience and understanding. They are in no way advertised, recommended or authorized to be used as medical equipment today. TERMS OF SALE: – All items are guaranteed genuine and as described.