Nice try 652, but IIRC, that font was introduced at the same time as our last major uniform overhaul, early in the Holmgren era. I remember Aros posting about it. He knows a bit about fonts and stuff, being a graphic artist and all.
The actual font, or wordmark was designed by Verlander design. Husband and wife design team. They also designed the Falcons, Texans, and Cardinals fonts, which are a very similar style to the Seahawks. I'm talking about the true type font, that you can install in your computer, thus get this font style in word processing documents. I used some font building software to create the true type font, quite tedious, because I had to create all of the letters in the alphabet, in the Seahawks style, when they aren't readily available, lower case as well.
One way to find out if this is the ttf font I created, look in the file properties, should have a created by and date.