This Thomas Duplex Super safelight is in excellent condition. This (DUB) safelight comes equipped with a filter set which is for standard B&W photographic papers or Orthochromatic films and papers (see below for proper configuration).
For B&W papers: The vanes should be open with the yellow-edged filters (FBD) in the body and the red-edged filters (FOD) in the vanes. Testing with various papers is recommended to gauge how open the vanes should be.
For Ortho films: The vanes should be fully closed with the same configuration of filters for B&W.
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