Seiko Mod Guide

Seiko NH34 vs 4R34 movement comparison covering mechanical differences, naming conventions, pricing, parts compatibility, which watches use each caliber, and whether NH34 equals 4R34 quality for 2025.

Complete comparison of Seiko NH36 (day-date) vs NH70 (skeleton) movements. Specs, reliability, use cases, and which movement suits your watch needs best.

Complete comparison of Seiko's skeleton movements—NH70 (no-date), NH71 (date), and NH72 (day-date). Specs, visual differences, and which skeleton caliber suits your watch build.

Compare Seiko NH35 and NH38 movements. Learn the key differences in date function, thickness, and which caliber is best for your watch build or purchase.

Understand the real differences between Seiko NH36 and NH36A movements. Complete technical comparison covering specs, compatibility, and which to choose for your mod project.

NH36 and 4R36 are essentially the same Seiko movement—but with key differences in branding, availability, and use cases. Learn which one is right for your watch or mod project.

Detailed comparison of Seiko 7S26 vs 4R36 movements: hacking, hand-winding, accuracy, reliability, and whether upgrading is worth the cost. Expert analysis.

Discover the Seiko NH35A automatic movement—the modder's choice for custom watch builds. Complete guide covering specs, NH35A vs NH35 vs 4R35 differences, parts compatibility, reliability, and why NH35A dominates the watch modding world.

Complete Seiko NH39 vs NH35 comparison: Learn key difference (date vs no-date), identical specs (24 jewels, 41hr reserve), dial compatibility, open-heart applications, modding uses. Expert guide.