"Medal for the expansion of New York in 1898"
Obviously not made in 1898, as it is dated 1948, so it was made in 1948.
One of the many large "Souvenir Pennies", some of which were listed in the booklet by Alpert. I collect them from Rockford IL and the area. There are a LARGE number of these, I must have 30-40 in stock.