A different twist to open single edge

[amishmotorboat]

I didn't win this one. I didn't even see it until it was over.
I'm not sure what it is, but I remember seeing the patent for it while researching something else.
Does anybody know what it is?
http://www.ebay.com/itm/Safety-Razo...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

 

[cpool222]

Interesting! Never seen one like it.

 

[amishmotorboat]

found the patent again.
E. S. Savage, pat. # 1,534,665 Filed Oct. 14, 1922