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Unread 10-19-2010, 10:22 AM   #1
sabbathmusic
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Default Striker on 1920 Commercials?

I have a 1920 commercial, 9025 lazy n with a striker with no grease grooves. When did they make the modification of the striker with the oil/grease grooves? I have seen WW1's with the grooves. ALso what does a commercial proof look like?
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