Oregon PowerMatch Bar Numbers Meaning

[How570]

Anyone Know How To Read These Numbers On A Older Oregon Bar,I Know It Fits A Husky Large Mount But Thats It

 

[How570]

8768 HDN
180———H009

Here are The Numbers ,Pics Were blurry ,Any Help Would Be Appreciated

 

[ray benson]

18" bar .050 gauge. The H009 is now the D009 bar mount for large Husqvarna saws and others.