I know this is slightly off subject but think it might be applicable in a way... I just don't know what that way is yet. I owned two double S model 2s that were in silver dot Johnson sheaths (the model 2-5s in the Knife Of The Week - Model 2" thread). There is a double S model 2 in one of Hunts books that's also in a silver dot Johnson sheath. All of the double S model 1s I've seen are in "Johnson" brown button sheaths.

Assuming the double s knives were all made during the same very brief time period, why would model 1s be in brown button sheaths and model 2s be in silver dot sheaths?

Stephen Infantino