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William is spot on that it is a D-9. The D-9 machines all had a 7 digit serial number with the first digit being a 2, They began for some reason around 2,2xx,xxx & went up into the 2,9xx,xxx numbers. The D in the model was for Wilbur Dial who designed the new bobbin arrangement & patented it in 1892. It was first used on the #11 & then in 1895 the #9 was upgraded to use the new bobbins. The interesting thing is the D appeared only in models which were already in existence & received some upgrade designed by Dial. When he played a part in the design of a new model, as in the #11 the D was not used in the model designation.?

For many years it was told the D stood for domestic. We now know that to be a myth. First W&W used the term Family machines rather than domestic so it should have been an F-9 on that premise. More importantly, though is the D-9 was the only family machine to use the D, while there were several industrial models which used it.

A general rule of thumb for a Rough estimate of the date on a D-9 is to take the serial number & subtract 2,200,000 from it & divide the result by 75,000, Add that number to 1895 & it will give you an approximate date.

Thus 2.791,561 - 2,200,000 = 591,561.? 591561 ÷? 75,000 gives 7.88 so call it 8. 1895 + 8 gives a date of 1903 ± a year.

127x1 is the correct needle. The Boye #18 needle is a correct substitute for this needle. I still have some of each so have not looked further "Yet". May have to soon. In my #8 & #9 machines which used the 126x1 round shank needle, I use a DBx1. It will not pass the locating screw on most D-9 machines, though my Singer 9W7 will barely accept one. This needle has a 1.64 mm diameter shank as opposed to the 1.75 mm shank of the originals. After being pilled down until the thread is picked up by the hook it sews just as well as an original, at least in every task I have put mine to.

Miller/TN

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