The International Cessna 170 Association

Can anyone help identify the difference between p/n 0713495-3 & 073495-4 (outboard bracket, landing gear support). I know the numbers have been up dated, but just looking at them, how to tell which is which? they look the same to me. ... Unless they aren't correct. I just acquired two, and they ...

Used PayPal to order my first one. Hope you still have some! It looks great.
Thanks