The missing year on the card must be 1927. After Oct 1, 1928 all calls became W prefix. 8CZN was licensed in 1926 and a complete logbook was found for this year. 8CJB was not listed in 1926.
8CJB, W8CJB, W3CJB 1927 Farrell, PA
8CJB QSL courtesy of K3RU
W8CJB QSL courtesy of W0JP
Photo courtesy of W8CXO