The Philadelphia Athletics Historical Society may disappear.

Like the last vestiges of a deep and memorable snow, those who played and rooted for Connie Mack’s A’s are gradually melting away. Soon, members of the historical society fear, the franchise which departed for Kansas City in 1954 after 53 years in Philadelphia and five world championships will be an increasingly obscure local memory, like Horn & Hardart’s, Woodside Park, or Frank’s Black Cherry Wishniak.

“And that would be a shame,” Ernie Montella, the society’s executive director, said Monday, “because the A’s were the most successful sports franchise ever in Philadelphia.”

Now, the grim demographic realities have financially stressed the society, which is down to about 700 mostly aging members. As a result, its 14,000-square-foot museum, library and gift shop on North York Road in Hatboro may soon close its doors.

Outside of the Brooklyn Dodgers, there doesn’t seem to be much nostalgia for other teams that moved from their original cities in the 1950s. Having lived in the Boston area for the last 30 years, you run into very few fans who miss the Braves. No one is clamoring to bring the Browns back to St. Louis, and NY Giants fans don’t seem to have the same pull as their Brooklyn counterparts.