Electrical Safety
I have an old machine from the 60s that I bought mainly for the sewing table. I've kept it in the folded down storage position while using the table for my (real?) sewing machine. I'd like to use this old machine as a backup. It's in working condition and the old owner used it without getting electrocuted, but how do I know the electrical system is safe? There's no obvious damage to the cord, but it looks like the original, which would make it 50 years old.