Which historic department store launched the first modern customer loyalty program in 1897 with 'Green Shield Stamps' that customers could collect and redeem for merchandise?

In the history of retail, customer loyalty programs have evolved dramatically. Before digital points systems and mobile apps, innovative retailers found creative ways to encourage repeat business. This question explores one of the pioneering customer loyalty initiatives that changed how stores built relationships with shoppers. Test your knowledge of retail history and the origins of customer engagement strategies!

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Selfridges (London)
Sperry & Hutchinson Company
Macy's (New York)
Le Bon Marché (Paris)