Originally Posted by
Lizziesews
ISMAC will give you a better idea of the value of your machine. There you can find find the number of machines manufactured from the number on the machine. Some in the millions, others in the thousands. Don't sell too cheap. Someone who wants to repair and update a machine to resale and make a profil won't hardly give you a dime for these old beauties, but someone who actually uses these machines for sewing and will actually give them a name (don't ask me how I know) would give you much more.
I looked up both serial numbers on ISMAC. The 1950 machine was made in a "batch" of 35000 and the 1910 machine was made in a "batch" of 30000. Mind you, batches of thousands of 66's were made at least three times a year. I don't think they are rare by any means.