Old wooden spirit level with two glass-covered vials

Old wooden spirit level with two glass-covered vials for horizontal and vertical measurement; the bubbles are intact and freely movable. The metal frames around the vials add character to the tool. The heavy wood has developed a beautiful aged patina. A label on the end reads "Quirin Haslinger – Österr. Lehrmittelanstalt, Linz/D. Klosterstr. 6." A high-quality vintage tool. Dimensions: 40 x 6 x 3 cm. Age-appropriate signs of use.