English: This is the ad / manual that came with the Upsal Solingen slant safety razor. The razor was made between 1932 and 1939. In English the text says:

"Our new adjustable Upsal razor

is unique in terms of precision and construction. The slant position of the head ..

[--left slant position-- --right slant position--]

.. helps it provide the smoothest of shaves, similar to those achieved by a very steady hand of an experienced barber.

Other benefits:

Large lather drains - the capacity of which is increased by four large lather exits - lead soap lather and cut stubble out, preserving the cutting efficiency of the razor.

Constant shaving readiness enables a precise shave without skin irritation.

Protruding serrated closed comb saves your skin from cuts.

The blade will not break because the slanted position is made by adjusting the whole head and not by putting more burden on the blade itself. This extends blade life as well.

Please note:

As you adjust the head to another position, ease the handle slightly before moving it."