Collection. Includes a certificate of authencity for piece by Charles Harshbarger of Blenko Glass Company, no. 301 of 365 for the year 2002 in envelope, a certificate of authencity for piece by Charles Harshbarger of Blenko Glass Company, no. 352 of 365 for the year 2002 in envelope; and: a computer printout of: Blenko Glass Company History from: http://www.blenkoglass.com/history/history.htm.