What year is my 4 speed

I started to work on my 4 speed and i noticed it did not have the block with the date code info. Does this mean it is an early a trans? If so will it still work in my 69 dart? I only thought it was an early a because i saw a trans just like it on ebay or somewhere and it was a 62-65 trans.

Any ideas would help because i haven't found much info on it.

thanks

justin