For Sale is a New Old Stock Sprocket for McCulloch chainsaws.   1/2" pitch 7 tooth.  It is for 19/32" diameter crankshaft. 

No package, and some minor rust from 50 years of storage, but it has never been used.

The only ones I have left do not have a package. They are brand new, never used, old stock from a closed dealer

This fits:
All gear drives with a 19/32" crankshaft except, 47, 49, 73, 77, 3-25, 4-30 and 4-30A

If you have any question of application please ask.