I think it's an Airflo Skagit NW head too. From their 2009 catalog: a 650 grain, ST9/10 (the heaviest listed), "pale peach". They don't list lengths, but my two Skagit NW heads are similar length. Good heads, just a little more delicate than shorter "beer can" skagit heads.
Keep your old line catalogs, because questions like this keep coming up.