My car was delivered in June too. VIN is 3604, production number is 1701. Subtract 3604 from your VIN and add the difference to 1701. That should get you close to what your production number is.
My VIN ends with 3620 so it should be around 1717 then! That's pretty close probably a day apart on the production line at the most!
ETIS did not work last time I checked so dont know the exact build date yet!