Seiko Caliber 8523A Quartz Watch Movement

Characteristics

Casing diameter: 17.6 mm

Maximum height: 3.8 mm without battery

Jewels: 2

Frequency of quartz crystal oscillator: 32,768 Hz

Driving system: Step motor (2 poles)

Regulation system: Trimmer condenser

Calendar: Day and Date

Instant setting device for day and date calendar

Bilingual change over system

Battery life indicator: The second hand moves in two-second interval.

Parts List

Remarks

Combination Types for Wheels

The following parts have different types based on combination:

• Fourth wheel & pinion
• Center minute wheel & cannon pinion
• Hour wheel

Type a:

• Fourth wheel & pinion: ☆241 340
• Center minute wheel & cannon pinion: ☆270 342
• Hour wheel: ☆271 342

Type b: (Note: As of this printing, Type b combination is not used. However, it may be employed in the future with certain case designs.)

• Fourth wheel & pinion: ☆241 457
• Center minute wheel & cannon pinion: ☆270 452
• Hour wheel: ☆271 452

Type c:

• Fourth wheel & pinion: ☆241 341
• Center minute wheel & cannon pinion: ☆270 343
• Hour wheel: ☆271 343

Winding Stem

Refer to the photograph on the front page. If the combination of the winding stem and case is unknown, check the case number and refer to "SEIKO Quartz Casing Parts Catalogue" to choose a corresponding winding stem.

Day star with dial disk

☆470 441 (English-Spanish, black figures on white background) is used when both the crown and the calendar frame are located at the 3 o'clock position. If any other type of day star with dial disk is required, specify the number printed on the disk.

Date dial

• 801 106 (Black figures on white background): Used when the crown is at 3 o'clock and the calendar frame is at 6 o'clock position.
• 801 340 (Black figures on white background): Used when both the crown and the calendar frame are located at 3 o'clock position.
• 801 341 (White figures on black background)
• 801 342 (Black figures on gold background)

If any other type of date dial is required, specify:

1. Cal. No.
2. The crown position
3. The calendar frame position
4. Dial No.

Holding ring for dial

The type of holding ring for dial is determined based on the design of cases. If the shape of the holding ring for dial is different from the photograph, check the case number and refer to "SEIKO Quartz Casing Parts Catalogue" to choose a corresponding holding ring for dial.

• ☆884 135
• ☆884 342

Battery

The substitutive battery might be added to the applied battery in the future. In that case, please refer to the separate "BATTERY LIST FOR SEIKO QUARTZ WATCHES". Note that SEIKO battery is marked with "SEIZAIKEN" on its (+) side.

• ☆SEIKO TR726SW
• ☆ SEIKO SB-DL
• ☆Maxell SR726SW
• ☆U.C.C. 397
• ☆Toshiba SR726SW