After investigation that began with blog article, "
Seahawks Sported Sans-Serifs, Silly" the following adjustments were made to Seattle uniforms of their first 26 seasons:
1976 - taller, slant-tops, serifs (also lowered helmets as they were ridiculously high!)
1977-78 - not as tall as '76, curve-top, serifs (lowered helmets)
1979 - box-tops, serifs, (lowered helmets)
1980-82 - already had as slant-tops, lowered helmets only
1983-93 - curve-tops, serifs (lowered helmets)
1994-2001 - slant-tops, sans serifs (helmets were already OK)
NEW
OLD