Antique EAPG Central Glass Knights of Labor Beer Mug

Antique EAPG 1800's Central Glass Co. Wheeling WV (1867-1891) Knights of Labor clear glass beer mug. Made in the 1870's for the labor organization (similar to a union) "the Noble and Holy Order of the Knights of Labor" or K of L for short. Has raised picture of a man holding a hammer shaking hands with a knight holding a sword. 5 ¾" tall with a 2 ¾" diameter. No chips or cracks but does have scratches ( see last 3 pics ). For an everyday use item that's 150 years old its it great shape!!