ICollectAvon.net

I have a couple an Avon award pin that belonged to my great aunt, and I'd like to find out more about it. It says "Avon Highest Award", and has a gold disk with black enamel and an 'A' set with 5 diamonds. The back is stamped Balfour 10K. There's a smaller pin attached by a chain, absolutely gorgeous--gold with black enamel, with a gold star in the center with 5 diamonds at the center. I'm guessing this might be a 50 year award pin (my great-aunt sold Avon for more than 50 years, and retired in the late 1980's), but I haven't been able to find anything even similar to compare it to. Any information about this pin would be greatly appreciated.