This document provides a complete parts catalogue for Seiko watch movements Cal. 7T32B and 7T42B. It lists each component, part numbers, and illustrations, and includes technical data such as dimensions, battery type, and performance specifications.
The guide also contains detailed repair and service procedures, including battery replacement, disassembly/reassembly steps, circuit block checks, and functional testing of the stopwatch, alarm and timer features.
| Outside diameter | 27.6 mm |
|---|---|
| Height | 3.2 mm |
| Battery type | SR927W (Seiko, Maxell, Sony, Eveready) |
| Battery voltage | 1.55 V |
| Battery life | approximately 2 years |
| Monthly rate (time loss) | < 15 seconds |
| Jewels | 0 |
| Step motor count | 4 pieces |
Short‑circuit the AC terminal and the circuit block cover with tweezers to reset the circuit before resetting the stopwatch hands.
The required battery voltage is 1.55 V.
The monthly rate at normal temperature is less than 15 seconds.