Daimler-Benz DB 605 on display at the Kermit Weeks collection, Florida USA.
View shows hollow propeller shaft for 20mm and 30mm motorkanone as used in some WWII German fighter aircraft.
<a href="//commons.wikimedia.org/wiki/User:Ssaco" title="User:Ssaco">Ssaco</a>
<span class="int-own-work" lang="en">Own work</span>