ChallengerOptics, Measuring Instruments, models:

CO-OLS-6100	Operating Manual
CO-OLS-MPO12	Interactive Operating Manual
CO-OLS-MPO12U	Operating Manual
CO-OPM-10	Operating Manual
CO-OPM-18	Interactive Operating Manual
CO-OPM-48	Operating Manual
CO-OPM-96	Operating Manual
CO-OPM-CW12	Interactive Operating Manual
CO-OPM-MPO12	Operating Manual
CO-OPM-MPO24	Interactive Operating Manual
CO-OPM-PON	Interactive Operating Manual