I attended his Mass in Alexandria, Virginia in the late 1960's.
That was most likely before this window was made. I would expect it wasn't
even designed prior to 1992, the year after both +Lefebvre and +de Castro-
Mayer passed away (one month separated).
From the linked website:
ST Athanasius Roman Catholic CHURCH Traditional Latin Rite
Sunday Masses at 7 am, 9 am, 11 am, located at the corner of RT.7 and Trap Rd.
9201 Leesburg Pike,
Vienna, VA 22182