I already posted this to another thread, but since this thread is actually about this subject I'll repeat the information.
I wrote Singer about this quite a while back. This was their answer:
“Thank you for writing Singer Sewing Company.
Unfortunately, the serial number data on our website is no longer available.
However, you can still get your historical questions answered by either emailing us at
[email protected] or by calling our Consumer Affairs Department at 1-800-474-6437 - Monday through Friday, 8AM to 4PM CST.
Cordially,
Singer Consumer Affairs
SVP Worldwide”
If you want to contact them, another email address is in the message -
[email protected]