Britannic (Wagner & Schmidt, 1901)
Do you know who is the first designer which used to strip down a traditional serif typeface? I know a contemporary example: František Štorm removes the serifs of the XVII th century Jannon Roman.
Jannon Antiqua
http://www.stormtype.com/family-jannon.html
Jannon Sans
http://www.stormtype.com/family-jannon-sans.html