sync motor question

["Metlicka Marc" <mystuffs-at-orwell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

hello all,
i have a question for those in the know about sync motors. i recently
got a blower assembly, it has a robbin myers ac motor on it, on the
label it reads 115v 60htz 3350rpm\ 115v 50hz 2725rpm, 1/3 hp.
my question is, since the speed is labeled different for the two
frequencies, could this be a synchronous motor?
it already has a very nice 5" flat belt pulley that bolts to a hub on
the shaft, and very smooth bearings.
i am hoping this can be a good find for a srsg?
thank you all in advance,  marc metlicka