Exploded Diagram & Disassembly / Assembly Guides

5106A Assembly and Disassembly

Also applicable for other 51xx series calibres such as the 5126A, 5139A and 5146A.

Oiling Guides

5106A Oiling Guide

Also applicable for other 51xx series calibres such as the 5126A, 5139A and 5146A.

Seiko Case and Crystal Conversion List

Seiko Case to Crystal Chart

A comprehensive document containing the crystal codes for Seiko Case Codes – covers most Seiko watches from the 60s to the early 80s.