This is an "Extremely RARE #4 Griswold Cast Iron Skillet" with the Griswold #4 Large Block Logo Heat Ring #702-A Erie PA. USA.  This Is An Outstanding and Rare Skillet, In Very Seldom Seen Extremely Nice Condition.  Skillets This Rare and In This Condition are Highly Sought After By Even The Most Advanced Collectors.  This is a Very Rare Skillet in the hard to find and much sought after Griswold Large Block Logo with Heat Ring, but to find one in such Great Condition is a Rare Opportunity.  This is a Rare chance to get a High Quality Rare Skillet 81 to 91 Years Old, that any advanced collector would be proud to have in their collection.  Circa: 1920-1930