Hannover: When the first tunnel was built, some "Breitraumwagen"
4xx were made some centimeters larger on the right side and got
folding stairs for use on high- and low-level platforms. Due to 
the impression they rose, they were called "Blumenkästen"
(window boxes). However, it was decided to buy TW 6000, so this
was stopped. TW 427 as the last of them now can be found at the
Hannover Tramway Museum (HSM) at Sehnde-Wehmingen.

Photo by Sven Herzfeld (s.herzfeld@maschsee.han.de)