take your fingernail and rub it back and forth across that area on the outside. if you feel something then its on the outside. pics can be deceiving but that looks to be on the outside of the glass.
whats funny is the sheriffs office i worked at would get 3 new units a year. they had me tinting the front 2 doors on them when they came in lol. so i have been tinting at least 3 jobs a year lol. the sallyport made a bad ass tint shop.