This is a 1980's Neumann U87 Serial Number : 43842, it is an earlier model than the current A i series but is very similar in design and facilities. It has 3 polar patterns, Cardioid, Onmi and figure of 8. There is a -10db pad and a high pass filter. Both switches are in full working order.
Here is some more U87 history for you thanks to Mary Spender and those nice people at You Tube