Hello Kittyannart - you lucky gal!
Older Singers didn't have the model marked on them. All my Singers are 1945 or earlier and not one of them has a tag with the model number.
I have been doing some FMQ on my 15K treadle this week. The feed dogs don't drop on mine. If yours don't drop either just set the stitch length to zero so the teeth don't move.