At least in the US I seem to mostly find those with the leather case, like my pair was. The bakelite case is super cool, but no idea of value. My pair and I believe most sets I encounter have the area above the "6x30" scratched off. I seem to recall my examples having "dienstglas" marked elsewhere, or maybe mine didn't have what was above it as vigorously removed, I'll try and locate pictures. If the optics are clear they are still perfectly good binoculars, I still have a post war set made by Zeiss Jena to similar spec that are my beaters.