So here is how I've ended up, but first background on the choices. I started in Vintage bikes with a Nishiki Professional and have since added five more vintage Japanese racing bikes. So when I came across these used, and from pictures in good condition, Sugino cone wrenches, their price and the quality I have found in Sugino components just struck a cord. I have a lead on an additional 15/16 mm cone wrench and will soon have a set of two in each of these necessary sizes.
My thanks.