Hello fever,
Welcome to TNet & thanks for showing us your lock. It's a Slaymaker, I believe. They made many different styles, and used many logos over the years.
<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=840462"/> <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=840468"/> <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=840469"/>
much better looking than a brass back of a lock I found couple days ago