G’Day
Its 0-16 gal and is in a wing mounted tank. Strangly the larger gear in the guage is showing signs of excessive wear and makes the guage inaccurate. The float is also showing signs of its age.
As an aside, my son is restoring a J5 Auster and is looking for the front tank fuel guage (and visible from thru the windscreen), but that is a long term project
cheers