Originally Posted by missgigglewings

My little girl was delivered today...there is no owners manual, so can one of you collectors-in-the-know please tell me what this part is for. It fits in a hole in the front right corner of the bottom.

I need to buy a key too!

She was born August 1, 1921 in NJ. She's a Singer 128, not a featherweight. (a 3/4 machine)