Robert Hazelwood seed look like this. There's a description at the bottom of the page here: http://www.heirlooms.org/half-runner-beans.html

It looks a lot like Rose. Turkey Craw is similar, but with lighter markings.

Oh yes! It does look like Rose. Robert Hazelwood is black (when fully dry), and Rose dark purple. Rose has white flowers, and 6" fat thick-walled pods.

Rose was my first guess too.

Thanks guys! Rose it is.