Katana by YoshiTani With Zodiac Showa Date with Rare 'W' stamp

Signature:  YoshiTani with Zodiac Showa Date with Rare 'W' stamp (F&G pg 227 xxi)
Forging Pattern:  Could not make out due to poor polish
Tempering Pattern:  Looks like suguha midare in nie, but difficult to make out due to condition.  
Dimensions:  Blade Length:  26.25 inchesNakago: 7.25 inches, 8mm thick, 32mm wide. 
Mountings: Saya only.
Overall Condition:  Fair.  Nicely finished tang with zodiac date leaves me to believe that this is a hand made sword.