NB: works OK, performs well but the optics have some marks/signs of age inside. Surfaces look clean, multi-coated. The built-in extendible HOOD (lens shade) is stiff. The front thread is Series VII and the screw-in retainer/adapter is fitted tight and I cannot undo it. Looks OK but has probably been in place many decades. SOLD AS IS exactly as pictured.
Iris is fine, nice and snappy, no oil on blades. Focus is smooth.
Leitz code 11111 No.2137900 Circa 1965 first Version with 5 element design, 4 in front of the diaphragm. Rear element is concave. Minimum aperture= f22
Minimum focus= 1.5m (5ft)
Weight= 675g