Chapter 3, 3rd page mentions an SE razor.
http://books.google.com/books?id=dBSwEkpWK-wC&lpg=PT32&dq=gem razor&pg=PT30#v=onepage&q&f=false
Came up in a google book search.
http://books.google.com/books?id=dBSwEkpWK-wC&lpg=PT32&dq=gem razor&pg=PT30#v=onepage&q&f=false
Came up in a google book search.