i see knives on ebay listed as "Case XX Family Tree" and with tang stamped as "Phoenix Knife CO.", or "Miller Bros." also "Germany" is etched on one of the blades. these are 4 1/2 in. whittlers. i have searched here and at the Case website, but find no reference to them. are they Case knives ? can someone explain what this series is about, who makes them and where, and app. age ? thanks, my education continues, roland