Printed in U.S.A. Matrix / Runout: LKL 21 (A side center label) Matrix / Runout: LKL 22 (B side center label) Matrix / Runout: LKL 21 E (A side run-out stamped (E is inside diamond)) Matrix / Runout: LKL 21 E (B side run-out stamped (E is inside diamond))