Yeah, I think that's about as good as you're going to do, Aarond. Sometimes you can narrow things down a bit from the information provided in the text entry. For example, there are sometimes design changes that don't result in a new "dash" variation and the text will say what year they were implemented. I didn't see anything like that in the text for the Mod. 36, though.
So, I hope this means we'll see you answering some of the "what year was my baby born" questions here, right?
Velma? That's very sweet.