To add to the confusion, Leatherman tried different sheaths in a limited run audience to gauge demand, as in sold only at their factory store in Oregon. Here are 2 examples. I think these date to around 2012 to 2016 but not sure. 51220785548_c621d17cd1_o by Chako, on Flickr51220573181_cc1e198e6c_o by Chako, on Flickr51219860642_6d9f12c225_o by Chako, on Flickr
Sheaths available around the Original Wave era
Guess I have to find one of each, it's the only way to be sure