These scales are glow-in-the-dark nylon, commonly referred to as Stayglow.
AFAIK, they only came from the factory on three different models: RescueTool, Climber, and Classic, though scale swaps to other models were/are common. You will find it referenced in SAKwiki on the RescueTool and Climber model pages.
Here are a Climber and Rambler with Stayglow scales…