CERTIFIED RELATIVE HUMIDITY HYGROMETER THERMOMETER INDICATOR. Model HTAB – 176. Made in West Germany for. ABBEON CAL INC LUFFT. Small dent on edge as shown in photo. 6″ x 1.5″. The item “RELATIVE HUMIDITY HYGROMETER THERMOMETER GAUGE. Model HTAB 176. Vintage” is in sale since Monday, September 14, 2020. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “jereben” and is located in Alexandria, Virginia. This item can be shipped to United States.