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Singer 9W Survey Results (2498 words) |
 | The class 9W machine was produced in at least four models – the 9W1, 9W2, 9W7, and 9W8. |
| It is tempting to theorize that the 9W7 was the first model, based on its use of the WandW 9 type bobbin, the serial numbers reported, and the manual dating; however, that is not consistent with Singer numbering for model variants or with the number sequence of the bobbin cases. |
| If the 9W was indeed manufactured into 1924, that is just under 7,000 machines per year on average, or less than ¼ of 1% of the reported 2 ½ million machines sold by Singer in 1913 (Sincere). |
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