I just got home from purchasing a MB 149. The Lady said her 93 Yr. old dad gave it to her, and he was a Surgeon. The Pen came with the original Box from Fahrhey's, which was White w/Gold Trim and has the paper work, saying he bought it on 12/5/1974. Unscrew the blind cap, and it looks like Ebonite with threads, with a Gold ring? Is there anymore information that anyone needs to place a date to this pen? There are no Serial Numbers up top....