It's wierd, I thought that the date code on a starter always read as "year, month, day"
Example

68, 307 starter, Dec 14th
I also have another 430 with the date code "0A20" which I read as Jan 20, 1970
Here is a May 30, 1970 but it has a 2 following I guess I'm somewhat confused?????????
I cant get a photo of the other one but the code is as listed originally "C13 7" ???
Are there two variations to the dating???