OK,Following this, assuming you may be misreading the letters due to age/wear:viewtopic.php?p=24772#p24772The "D" must be a 175 model.
Quote from: "Capt. Bob"OK,Following this, assuming you may be misreading the letters due to age/wear:viewtopic.php?p=24772#p24772The "D" must be a 175 model. Here is the photo, FWIW: