A Puch Ms 25 motorcycle with a hydrazine-air fuel cell, arguably the world's first ever fuel cell motorcycle, developed by Karl Kordesch.
<a href="//commons.wikimedia.org/wiki/User:Braveheart" title="User:Braveheart">Braveheart</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>