Does anyone happen to have a copy of:

Stanley, Philip E. (1984). Boxwood
      
      & ivory: Stanley traditional rules, 1855 - 1975. The Stanley Publishing
      
      Co., Westborough, MA.

I found a folding rule segment marked "Warranted Box Wood" This mark was used by the Stanley Rule and Level co, active 1857-1920. Internet searches have been helpful, but I was wondering if the Stanley book might have more specific info. 

I can post or send photos if needed.

thanks,
Carl Steen