Passing along fwiw - the Case large belt sheath, part 50289, fits the Model 23 Case, GEC, and similar jumbo trappers.
Here is a photo with a Case Bose Bullnose Trapper and GEC Model 23, both with two blades. The color is after treating both sheaths with Obenauf’s Heavy Duty leather treatment, which is a mixture of wax with an oil.
Here is a photo with a Case Bose Bullnose Trapper and GEC Model 23, both with two blades. The color is after treating both sheaths with Obenauf’s Heavy Duty leather treatment, which is a mixture of wax with an oil.