Lovely item - felt backed for desktop use.
Excellent condition.

Age unknown.
Great condition with no marks. 
Hinge works perfectly.
Weighs 400 g.

The Van Nelle factory in Rotterdam is now a World Heritage Site. 
In the 20th century it was a factory, processing coffee, tea and tobacco and later on additional chewing gum, cigarettes, instant pudding and rice. 
The operation stopped in 1996.