Summilux 1.4/50mm SOWGE pre-series

Extremely rare Summilux pre-series, from the first batch of production, starting with no.1546001 and including lenses with Summarit or Summilux engravings, in very good condition, good optics with a few discrete cleaning marks on the front element, typical for these pre-series, the numbers on the aperture scale are engraved bigger, '1.4' engraved on the depth of field scale, glass in the front element is slightly radioactive, interesting late delivery to Munich on 23.06.1961, Leitz probably updated the front ring as the Summilux version was already available on the market, together with XOOIM hood with cap and plastic keeper.