vintage 20s salesman's guide w/art deco binding&photos

Old Art Deco 1927 edition of "Salesmanship Simplified - A Shortcut to Success", published by Opportunity Magazine. This has an embossed art binding, 300 pages and is "illustrated with one hundred photographs". This has lots of great vintage photos!

This is in nice vintage condition, but it does have a musty odor for years in an attic.