Industrial Portuguese Oak Tambour Door Filing Cabinet from Olaio, 1940s

This cabinet was designed and produced by Olaio, in Portugal during 1940's. It is made of oak and has two tambour doors  (a pull down from the top and another from the bottom) that conceals 30 drawers, 1 shelf and 2 trays inside. The handles are in wood. This kind of pieces were usually made for offices and schools, this one in particular, belonged to a secondary school in the North of Portugal. With the original stamp from the producer in the back. In original and good condition.