More info on my 306w
Just heard back from Singerco today, and unfortunately my 306w is a "W" serial number... the missing years. The only info they could Give is that is was a Bridgeport Cn. machine and they started using "W" in the serial numbers begining 1910. Also they mentioned that the book " Blue Book of Singer Sewing machines " listed the 306w being made in 1953 and 1954.
I guess that is as much as I will ever know.
here is a closer picture of it the flash kind of "Glazed" the wax but it looks pretty ok.
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I did manage to get the first 10 "cams" for it and have been playing around with fancy stiches...its kind of fun.