Servicing projection equipment (1932)

Record Details:

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FORMULAS 153 National Cored and Solid Projector Combinations for Mirror or Reflector Arc Lamps Horizontal Trim Lamps Arc Amper Size Kind age 10-15 Positive 9m/m x 8" National Cored Projector incl. Negative 6.4m/m x 8" National Solid Projector 16-20 Positive 10m/mx8" National Cored Projector incl. Negative 7m/mx8" National Solid Projector 21-25 Positive 12m/mx8" National Cored Projector incl. Negative 8m/m x 8" National Solid Projector or 8m/m x 8" National Cored Projector 26-30 Positive 13m/mx8" National Cored Projector incl. Negative 9m/mx8" National Cored Projector 31-35 Positive 14m/mx8" National Cored Projector incl. Negative 10m/mx8" National Cored Projector Angular Trim Lamps Arc Amper Size Kind age 6-10 Positive 9m/mx8" National Cored Projector incl. Negative 8m/m x 8" National Cored Projector 11-15 Positive 10m/mx8" National Cored Projector incl. Negative 9m/mx8" National Cored Projector 16-20 Positive 12m/m x 8" National Cored Projector incl. Negative 10m/mx8" National Cored Projector