HISTORICAL ASTRONOMICAL ADDS 1953 (Edmund Scientific Corporation) 1953 (Unitron) 1954 (Brandon) 1954 (Criterion) 1954 (Edmund Scientific Corporation) 1954 (Edmund Scientific Corporation) 1954 (Jaegers) 1954 (Unitron) 1954 (Unitron) 1955 (Clavé) 1965 (Clavé) 1971 (Perl) 1973 (Bausch & Lomb -S olar Filters) 1973 (Byers) 1973 (Cave Optical Company) 1973 (Cave Optical Company) 1973 (Coulter Optical Company) 1973 (Criterion Manufacturing Company) 1973 (Jaegers) 1973 (Jaegers) 1973 (Meade Instruments) 1973 (Star-Liner Company) 1973 (Telescopics) 1973 (Tuthill - Solar Skreen) 1973 (Unitron) 1973 (University Optics) 1973 (University Optics) 1974 (Byers) 1974 (Byers) 1974 (Cave Optical Company) 1974 (Celestron) 1974 (C & H Sales Company) 1974 (Criterion) 1974 (Group 128 Inc.) 1974 (Meade) 1974 (Perkin-Elmer) 1974 (Questar) 1974 (Questar) 1974 (Tuthill) 1975 (Cave Optical Company) 1975 (Celestron) 1975 (Meade) 1975 (Vernonscope) 1976 (Astro-Physics) 1976 (Criterion) 1976 (Daystar) 1976 (Meade) 1976 (Optica) 1976 (Star-Liner Company) 1976 (Tuthill) 1977 (Coulter Optical Company) 1977 (Cross Optics) 1977 (Edmund Scientifi Corporation) 1977 (Meade) 1977 (Parks) 1977 (Robert Little) 1977 (Swift) 1978 (Cave Optical Company) 1978 (Edmundo Scientific Corporation) 1978 (Optical Techinques Incorporated) (S & S Optika) 1978 (Orion) 1978 (Parks) 1978 (Vernonscope) 1979 (Astro-Physics) 1979 (Astroscopics) 1979 (Celestron) 1980 (Byers) 1980 (Coulter) 1980 (Coulter) 1980 (Daystar) 1980 (Mathis) 1980 (Meyers) 1980 (Questar) 1980 (Tuthill) 1981 (Byers) 1981 (Coulter) 1981 (Henzel) 1981 (Lumicon) 1981 (Mathis) 1981 (Meade) 1981 (Unitron) 1981 (Lumicon) 1982 (Mathis) 1982 (Televue) 1983 (Astro-Physics) 1983 (Bushnell) 1983 (Lumicon) 1983 (Meade) 1983 (Optec) 1983 (Takahashi) 1983 (Takahashi) 1984 (Celestron) 1984 (Jim Mobile) 1984 (Orion) 1985 (Purus) 1985 (Televue)