Yours looks exactly like one I just bought. But mine was made into an electric, and I am going to put it back to treadle as soon as I can. I get it some time this week. Can't wait to see it in person...so far I only have pics from auction.
Mine is a 66-1, and I do not think yours is a 16K..they look very different. Check the serial number you posted. Some of Singer's old records are incorrect, too.
The serial number you posted does come up a 16K made in 1920. But that's not your machine.