Seiko NH-DIFFERENCES

The NH is an automatic movement manufactured by Seiko. It features hand winding, a bidirectional rotor, and quickset date functionality, with Diashock shock protection. The caliber family includes variants such as the 4R34 through 4R39 and 4R71, differing primarily in their day and date complications. TMI Seiko Instruments markets the NH calibers as part of their "Basic" Mechanical Series, positioning them as entry-level movements in their portfolio.