1 3/4″ wide. Bronze.”PAT OCT. 21 ’73 APR. 20 ’86” is stamped on the reverse of the shackle. T. C. Henry began constructing the Crowley County Colorado irrigation canal in 1888, completing his work in 1891. The project became known as the Colorado Canal Company.Patent # 143831 Milton Jackson Patent # 340319. (S-5).