needles for Singer 27
What size and type of needle fits an old 27 treadle from very early 1900's? Trying to figure out if my Singer 27 actually works. It was my grandfathers. It was used in his cotton farming operation to make cotton sacks. It is not in good condition, but the wheel turns and I have managed to remove the shuttle and bobbin without difficulty. I'm in the process of cleaning and oiling. It has sentimental value.
Thanks for any help you can give.