Rim sprockets from other than Stihl

[lone wolf]

 

[lone wolf]

I dont know what they fit but the holes are smaller than whats on all my 70 cc stihls.

 

[Bob Hedgecutter]

I just found a listing for the part manufactured by a company by the name of GB, and there is indication that it originates in Australia.
Any experience, input on that regard?

GB most certainly used to offer clutch "bells" and drive spurs that were indeed stamped with GB- I am talking 1980's here- no idea if they still do, but I have an idea they were made under contract by the same manufacturer that made either Oregon, Windsor- or both and stamped with GB.
Same thing happens with guide bars- buy enough from the manufacturer and you can have them stamped with your logo- ever see a Carlton bar made by Tsu Mura?