bruce wayne said:No, I know that it has a wider brim & i think a taller crown.
Akubra Federation III (dimensional 2 7/8" x 2 3/4" brim with a 6" crown height)
Akubra Federation IV (dimensional 2 3/4" x 2 1/2" brim with a 5 5/8" crown height)
Akubra Adventurer (dimensional 3 1/8" x 2 7/8" brim with a 5 1/2" crown height)
Tone said:Unless they've tried to fix it behind the scenes, the Fed IV has a taller crown.
The Adventurer (originally to be named the "Explorer") is not as tall crowned as the old Federation III - or IV - but it does have a wider brim like the old Federation.
Ribbon is a bit light on the Adventurer.
More info on what people were observing between the hats at the time.
http://thefedoralounge.com/showthread.php?t=37448&highlight=Akubra+Adventurer
http://thefedoralounge.com/showthread.php?t=36723&highlight=Akubra+Adventurer