Seiko M795A – Technical Guide

The Seiko M795A is a digital quartz movement from the early 1990s, designed for use in Seiko's compact, functional LCD digital watches. Although not as feature-rich as Seiko’s professional diving or recording models, the M795A is a well-balanced, slim module that delivers essential digital functions in a refined, dress-oriented case. These watches were aimed at users who valued discreet styling and everyday practicality.

Movement Overview

The Seiko M795A is a digital-only quartz LCD module, known for its minimalist interface and high efficiency. It delivers core timekeeping features while maintaining a slim and elegant profile—ideal for business or casual wear.

Core Functions:

• Digital time display (12-hour or 24-hour format, depending on model)

• Full calendar (day, date, and month)

• Daily alarm

• Hourly chime

• Stopwatch (1/100 second, up to 60 minutes)

• Electro-luminescent or incandescent backlight (varies by model)

Battery Type: CR2016 lithium coin cell
Battery Life: Approximately 2–3 years, depending on alarm and backlight usage

Display and Case Design

The M795A movement is typically used in watches with simple, rectangular or oval cases. These watches reflect the clean styling of the early 1990s, where less was more in terms of digital watch aesthetics.

Display Layout:

• Large numeric digits for hours and minutes

• Smaller fields for seconds, AM/PM, day of the week, and calendar indicators

• Additional symbols for alarm and chime status

Typical Case Specs:

• Width: 32–36 mm

• Thickness: 7–9 mm

• Crystal: Mineral glass or acrylic

• Water Resistance: Usually 30 meters

• Case Material: Stainless steel, gold-tone, or chrome-plated

• Strap: Integrated metal bracelet or slim leather strap

Button Configuration and Functions

Most watches using the M795A movement feature three or four pushers, depending on case design. Functions are intuitive and standard for digital watches of the era.

Typical Button Layout:

• Mode (usually lower left): Cycles through Time → Alarm → Stopwatch → Calendar

• Set (lower right): Enters setting mode for current function

• Start/Advance (upper right): Changes values in setting mode or starts/stops the stopwatch

• Light (upper left, if present): Activates the display backlight

Setting the Time and Calendar

1. Press Mode to access the time display.

2. Hold Set until the hour digits flash.

3. Use Start/Advance to adjust the value.

4. Press Mode to move between hours, minutes, seconds, month, date, and day.

5. Press Set again to confirm and exit.

Alarm Setup:

1. Press Mode to enter alarm mode.

2. Hold Set until the alarm digits flash.

3. Use Start/Advance to set the hour and minute.

4. Toggle alarm and chime on/off with short presses in alarm mode (varies by version).

Maintenance and Servicing

Like most digital quartz movements, the M795A requires minimal upkeep but should be handled with care due to its age.

Servicing Tips:

• Use CR2016 battery, installed with non-metallic tools to prevent static discharge

• Some models require an AC reset after battery change (short two contact points momentarily)

• Gaskets should be inspected and replaced if water resistance is a concern

• Backlight may dim or fail with age—typically not user-replaceable

• Avoid direct impact to protect the LCD panel, which may be irreplaceable due to age

Notable Models Using M795A

Seiko produced several elegant and minimalist digital watches using the M795A module, often branded under its standard Quartz line rather than sports or professional series.

Common features include:

• Brushed or polished metal cases

• Slimline design, suitable for both men and women

• Simple casebacks engraved with “M795-XXXX” reference codes

• Integrated bracelets or classic lugs for strap versatility

These models are now found in the vintage digital watch market and are appreciated for their simplicity, clarity, and retro appeal.

Final Thoughts

The Seiko M795A movement is a perfect example of practical digital watchmaking. While it lacks the flashy features of Seiko’s diving or data bank watches, it excels in reliability, legibility, and subtle design. For collectors and everyday wearers alike, an M795A-equipped watch offers a dependable and stylish glimpse into Seiko’s understated digital legacy from the 1990s.