Graduation photo is marked 1946, but also marked age 15

Invitation to Mr. & Mrs. Ernest G. Smith, 2805 Balltown Road, Sch'dy 10, New York - postmarked Schenectady, 7-18-1949 (8:30 pm!). Mrs. Mary A. Smith requests the honour .... wedding was at First Baptist Church, Schenectady. Return address was R.F.D. #4, Box 242 Vley Rd., Scotia, NY.