Need help remembering

So one day out in service about 6-7 years ago, I was in service with an elder and doing regular door to door, we came to this household that was the strangest I have been on. The couple was part of a very small sect of people that broke off from the JWs back in the early days, and their focus was on researching the Bible. The elder I was with was actually shocked and intrigued to meet them. We sat and talked with them for like 30 minutes. I tried asking the elder for a bit of a history lesson after we left, but of course his input was sparse. Anyone else experienced this “group”? Any help identifying them would be helpful to me. Thanks in advance!