I sent a pic from the ebay link of the unsigned sword in Chris's link to Simon and he said
" Hi my dear friend. Im pretty sure this abrasive sword is not my work. Both size and scale are wrong . Im pretty sure its made in China. I think its 5 years not 500 as he describes it. But this is just my opinion and thoughts, I hope it can help you.
Thank you for your letter have a nice day. Simon."
Greg