Introduction to the Seiko 7752A

The Seiko 7752A is a multifunction quartz analog movement developed in the 1980s, during a period when Seiko was leading the way in blending classic analog displays with modern quartz functionality. The 7752A stands out by offering both a daily alarm and a dual-time feature — all in an analog format, with no digital displays. This made it especially useful for travelers, business professionals, and those who appreciated analog design with practical features.

---

Technical Specifications

---

Functional Layout

The Seiko 7752A is structured to manage multiple functions through a clean analog interface. It includes:

• Three central hands: hour, minute, seconds

• Alarm hand, usually central or subdial-based

• Secondary subdial to display dual time (second time zone)

• Pushers or recessed buttons to control alarm and second time zone settings

• No calendar window, keeping the design minimal and legible

This layout was tailored for users who needed functionality without visual clutter.

---

Crown and Pusher Operation

Crown Positions

Pusher Functions

Most models feature one or two pushers to control:

• Alarm time setting

• Alarm on/off toggle

• In some cases, to adjust the dual time subdial

Depending on the model, the alarm hand is either centrally mounted or placed on a separate subdial.

---

Alarm Function

• The alarm is analog, activated when the alarm hand overlaps with the main time

• Sound is generated via an internal piezoelectric buzzer

• Alarm typically sounds for about 10–20 seconds

• The alarm must be re-enabled daily or toggled manually

Alarm activation is based on the mechanical alignment of the alarm hand with the current time — no internal clock tracks it separately.

---

Battery Information and Replacement

Battery Type

• SR927W (Seiko 399)

• Voltage: 1.55V

• Typical battery life: 3 years

Replacement Steps

1. Open the case back using the appropriate tool

2. Remove the depleted battery using plastic tweezers

3. Insert a fresh SR927W, ensuring correct polarity

4. Locate the AC (All Clear) contact on the movement

5. Use tweezers to short the AC contact to the battery’s positive terminal

6. Confirm that the seconds hand begins ticking

7. Test alarm function and secondary time zone

8. Reinstall case back and ensure gasket integrity

Always test the buzzer after battery replacement to confirm the alarm is operational.

---

Servicing and Maintenance

Although quartz-based, the 7752A was built with modular components, and minor servicing is possible.

Common Maintenance Tasks:

• Clean buzzer contact spring if alarm weakens

• Re-align alarm hand if slipped

• Inspect and clean subdial gears if dual-time becomes erratic

• Replace coil or motor if watch is not ticking even after a fresh battery

Service Interval

• Battery: every 2.5–3 years

• Full movement check: every 6–8 years, or as needed

---

Troubleshooting Guide

---

Watch Models Using 7752A

The 7752A was used in:

• Seiko dual-time quartz watches with alarm function

• Travel-oriented models from the mid to late 1980s

• Some Seiko-branded models under Pulsar or Alba with multifunction design

• Watches with two crowns or extra pushers, often with “world time” or “dual time” text on the dial

These watches were ideal for users needing dual timezone tracking and a daily reminder, all within a compact analog design.

---

Conclusion

The Seiko 7752A is a versatile and practical analog quartz movement that delivers:

• Daily alarm capability

• Dual time zone tracking

• Quartz accuracy with hacking seconds

• Clean, functional design without digital elements

Though relatively rare today, the 7752A remains a unique and collectible caliber for those who appreciate vintage quartz watches that go beyond basic timekeeping — combining form, function, and history in one movement.

Download