I believe the only mantles 1952-1969 that have gone up in value are the higher grade PSA 9's and 10's. Lower grade Mantles that I sold 20 years ago, I can buy today for around the same price. I would invest in Babe Ruth before any Mantles but I believe the T212 Obaks are very under rated compared to T205's and T206's but a Plank would be nice too
