I have original Singer books here as well, and I can confirm like Cathy did, that it's a 193077. I had one here, it needed a belt (cracked, but still working), it was on its way, but the guy wanted the machine first. So I called him when the belt arrived, and he hasn't been back for it. It's been 6 months. Now I'm wondering if I even have the right belt sitting here for him.