Which early retail payment innovation, patented in 1879, was advertised with the slogan "It pays to keep count" and fundamentally changed retail by reducing theft and improving accounting?

The evolution of retail payment systems has fundamentally shaped commerce throughout history. Before modern digital transactions and contactless payments, several key innovations transformed how merchants handled transactions. This trivia question explores one of the most significant early retail payment technologies that revolutionized commerce in the late 19th century and set the foundation for modern retail operations.

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The National Cash Register (NCR) mechanical cash register
The Shopper's Mechanical Credit Card Imprinter
Edison's Electrical Transaction Counter
The Lamson pneumatic tube payment system