I'm currently working on a project right now with some other members that might explain it for everyone..
when we finish our research we'll open a forum on the subject.
Any search will only revel a start date and end date with options... and even they might not be accurate..
Mine is from 1890 and shows it as a Q1 but is really a Q2...and marked as such...
You can get the exact date of turnout..But no customer info. until later on unfortunately most generally its a hardware store..but you could get lucky..The Dr will tell you..He seems to be pretty cool on that end..