Sure. Like I say, it's nothing official. Just word of mouth through this forum. If we all had pictures to post of the date codes we could be much more certain. Like these.
3/9/1970
1/26/1970
Notice how the 1/26 JW has the MI over the 0 stamped sideways which is probably less common than how the 3/9 is stamped. These went to 2Many.
I'll post some more pictures of date codes later that I have. Some KN and some KR