Seiko Mod Guide

Compare Seiko VK63 vs VK64 meca-quartz movements. Discover subdial layout differences, date complications, accuracy specs, and best chronograph watches using these hybrid movements in 2025.

Complete guide to the Seiko NH38 movement. Learn specifications, NH38 vs NH35 differences, skeleton watch applications, and maintenance tips for this no-date caliber.

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 Miyota 8215 vs 9015 movements. Detailed specs, features, and honest recommendations to help you decide if the upgrade is worth the extra cost.

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

Discover what Seiko mod watches are, why they use Japanese movements, and how to evaluate quality. Complete guide to NH35, NH34, VK63 movements and mod watch types.

Complete Seiko NH39 vs NH38 comparison: Learn identical specs (24 jewels, 41hr reserve, no-date), key differences (open-heart vs standard design), modding applications, pricing, which to choose. Expert guide.

Complete Seiko NH70/NH70A skeleton movement guide. Learn NH70 specifications, whether NH70 has date function, NH70 vs NH72 vs NH35 comparison, skeleton movement pros and cons, and whether NH70A delivers good quality for skeleton watches.

Complete guide to Seiko's 4R36 day-date automatic movement. Learn how 4R36 differs from 4R35, technical specifications, day complication functionality, where it appears in Seiko collections, accuracy expectations, and whether day-date feature justifies choosing 4R36.