Mixed lot of slide rules / slide rules

Lot 8500 limit € 30

13 pieces in total, manufacturer: Albert Nestler AG year, Meissner KG Dresden and Reiss, including the heating and ventilation engineer's pipe slide rule, slide rule for wall thicknesses and various pocket slide rules, some with operating instructions and case, signs of wear, L approx. 15-32 cm, second half of the 20th century