Maybe your remember the quiz show "Name that Tune". Maybe you were born after dinosaurs were extinct and don't remember that show.
Either way, can you help identify a lensboard I received with an enlarging lens. It's a pretty hefty machined plate 4.5" in diameter. The threaded lens opening is 49mm, so must be for a 4x5 or larger enlarger. It's not for any Omega or Beseler that I'm aware of. TIA.
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