Sommer & Kaufmann is a really tough issue. There were two sets, 1948 and 1949. This is the 1949. ACC designation is H801-4B. PSA's total pop on the 1949 set is 13 cards with 0 Lefty O'Douls; the 1948 set has three cards graded, also 0 O'Doul cards. Now, since I am an O'Doul collector, I had been searching for this card for a while. When I saw the 1949 on eBay, signed, with a BIN, I couldn't believe it. I hadn't even seen the card before, nevermind a signed one. There are reprints and counterfeits of the S&K issues but the signature was a perfect vintage Lefty, that I was sure of, so I wasn't too worried about the card itself being a fake. It was like that Groucho Bowman card when I saw that. Didn't care about the price, just had to have it.