I'm hoping someone can help me identify this Tech that I picked up. Its case doesn't seem to match any that are shown on the mr-razor site. On the razor's lower plate it says "REG US PAT. OFF. Gillette MADE IN USA." And of course there is no serial number or date code. The case is black with a fuzzy dark blue cotton interior. There is a metal blade case that says "GILLETTE BLADES" on the cap. Thanks in advance for any help.