Lux Optik
Source: https://www.flickr.com.Photo: Florian Hardwig. License: All Rights Reserved.
Store front of an optician on Karl-Marx-Straße, Berlin-Neukölln. The typeface in use was "designed in 1969 when Christine [Lord] was 21 as a special project to create a corporate identity for the new Oxford Polytechnic. The face was originally called Lord Lower Case Linked, but was later renamedOxfordwhen picked up by Face Photosetting. It was then made available as dry transfer lettering by Letraset." — tell 'u' from 'n' and typically appears in traditional German handwriting and script typefaces. Here, it is dispensable.
The photo was taken in 2011. The sign has soon after been replaced by something less interesting.