You did great! If you don't already know it's most likely a Singer model 127. I'm guessing 127 due to the motor mount boss and position of the bobbin winder. That one will clean up and look great! Most of the Sphinx decals I see are pretty beat up. Yours is better than about 80% of the ones I've seen.
If you read the serial number you can get the date it was authorized to be made here:
http://ismacs.net/singer_sewing_mach...-database.html
I keep it bookmarked because I use it a lot. You can also download a free user's manual from Singerco.com.
I hope this helps and that you're not just shaking your head saying "I know".
If you're still learning about the old black machines be sure to check the sticky on cleaning it and Glenn's tutorial on cleaning and restoring the cabinet.
Congrats on a great find!
Rodney