Item no. P2607 (cover)
Type: cover
Country: Germany
Date of use:
Business stationery (cover) used by the company BYK-GULDENWERKE Chemische Fabrik Aktiengesellschaft in Berlin (Germany). Apart other chemical products, the company manufactured also photographic papers, films, plates and chemicals.
The stamp used is a “perfin” i. e. stamp bearing small round holes punched to form pattern of part of the company’s name i.e. “BYK”.