Can you help identify this yanagiba?

I bought this knife years ago and have almost never used it -- ended up much preferring a chef's knife to a yanagiba. Now that I've got a renewed interest in Japanese knives, I'm curious to know what it is, as I've forgotten long ago. If I were to sell it, is it worth much? It's a 9" in excellent condition, with the caveat being that the knife has sat in a knife block in my kitchen unused for...maybe 20 years. ;-)

http://lecount.org/yanagiba.jpg

Can anybody shed any light on this?

Thanks much!
Jason

machine made mass production by Shimomura Kogyo Co.,Ltd. stainless steel super alloy blade material, hardness HRC57. available Black laminated plywood western handle or oval handle...around ￥2400~ 3000($28~35). similar onehttp://www.amazon.co.jp/gp/switch-language/product/B003AM7KWQ/ref=dp_change_lang?ie=UTF8&language=en_JP

Great to know what I have...Looks like I'll be making room for a new gyuto in my knife block! ;-)

Thanks again!
Jason