When was your car built?
I believe one difference is the sword stripes were reflective and the 9 pinstripe ones weren't.
I found this in an old thread about the 9 pinstripes
"The last style '72 D98 stripe has been referred to for years as the "sperm whale", or "9 stripe" version for the illusion of a stack of pinstripes, 9 total. This style stripe was the optional style D98 body stripe available on '72 GTO's, and avail on '72 LeMans 2doors when the T41 endura styling option was ordered"
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