A Green pay phone only use Telephone cards in the Seibu train.
<a href="//www.flickr.com/people/28129755@N03" class="extiw" title="flickruser:28129755@N03">Mekkjp</a>
CC BY-SA 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/28129755@N03/5929628185">西武線の特急に公衆電話。テレホンカードのみだが…誰が使うんだ(苦笑)</a>