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I recommend the shapes of the two at the far left, for ease of shaving.
All of them are used. They all took serious work to bring to shave ready. A couple...

Huge amount of information here, don't let the title throw you:
http://straightrazorpalace.com/japan/42021-kamisori-handles-rattan-ivy-skin.html
After all that, if you shave with a straight...