I snapped this at a museum in Bavaria in around 1980 but there were no clues as to what this type was.  Any help appreciated.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/130275500@N02">G B_NZ</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/130275500@N02/16861275161/">Tyep unknown</a>