Knickerbocker still sold well in Massachusetts even after demand cooled in New York. I don't think production continued after it's last brewer, Schmidt's of Philadelphia closed.
Apparently, Heileman brewed Knickerbocker
(probably in Baltimore, with the rest of the C. Schmidt's & Sons brands they bought) for awhile, as did Stroh after they bought the Heileman brands and breweries.
The Ruppert brewery was, perhaps, the first major
East Coast brewery to collapse after Repeal. They were in the top 5 in the late 1930's (larger than their local NY-NJ competitors Ballantine, Leibmann [Rheingold] & Schaefer) but had fallen to #16 (pretty much tied with another local metro area "also ran", Piels) on the 25th Anniversary of Repeal in 1957 and the 3 other locals were all in Top 10, brewing 2-3 times as much beer.
By 1965, they were gone- and the labels bought by Rheingold. They were the last brewery in Manhattan- until the brewpub, the Manhattan Brewing Company, opened in the mid-1980's.
<message edited by jesskidden on Mon, 01/11/10 8:17 AM>