43.8 grams. H?
TKW 860 grams. Fall not observed. Found 1957, Randall County, Texas, USA.
MetBul shows classification as an H? (that is H question mark) and defines this as "An ordinary chondrite that may be from the H group and for which petrologic type has not been determined." Canyon is one of only two of this classification (as listed in MetBul), the other being Hachi-oji from Japan.
Provenance on this goes back to the Institute of Meteoritics at the University of New Mexico. The inventory markings on this piece, I believe, are from Lincoln La Paz who founded the IOM where he was the director until approximately 1966.