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Casio AEQ-120 manual and battery (CR2025)

Casio's operation guide for the Casio AEQ-120 is the PDF for module 5679: Casio operation guide 5679 (PDF) ↗. It takes a CR2025 battery. The case is 52.2 mm wide, 53.3 mm long (case length L, not lug to lug), and 16.8 mm thick.

Sources checked · How we source numbers
Width (W)
52.2 mm1
Case length (L)
53.3 mm1
not lug to lug
Thickness
16.8 mm1
Lug width
not published by Casio
Casio AEQ-120: size drawingCasio AEQ-120, round case, top and side view to scale: case diameter 52.2 mm, case length (Casio L) 53.3 mm, lug width — (unknown), thickness 16.8 mm. Bezel, dial and crown size are schematic.lug width —Ø 52.2case length (Casio L) 53.3TOPthickness 16.8SIDE
Casio AEQ-120, top and side, to scaleDrawing from data, not a photo · mm

Module 5679 twins

Casio's manual list puts 1 model codes on this module: same functions, same manual, often the same battery.

Codes of the Casio AEQ-120 family[2]AEQ-120W

Module: Casio module 5679

The Casio AEQ-120 runs on the Casio module 5679.

Battery

Casio AEQ-120 specifications

Case width (W)
52.2 mm1
Lug to lug
not published by Casio; see case length (L)
Case length (L)
53.3 mm1Casio's L of L × W × H, measured differently from lug to lug; we never swap one for the other.
Thickness (H)
16.8 mm1
Lug width
not published by Casio
Weight
58 g1
Crystal
Resin Glass1
Water resistance
100 m1
Module
casio/56792
Battery
Accuracy
±30 s/month1
Years made
start not published
Case code
not used by Casio: the module number (module 5679) identifies the watch
Band fits
145–215 mm wrist1

On your wrist

The verdict compares the case length (L) with the flat top of your wrist. Balanced from ~19 cm, past the edges below ~17 cm.

= 6.7 in

At the edge on a 17 cm wrist: the 53.3 mm case length (L) covers 97% of an estimated 54.8 mm flat top.

Casio publishes no lug-to-lug for this model, so the verdict uses its case length (L). The strap or bracelet joins inside that length, which makes this a cautious estimate.

Casio cuts the band for wrists of 14.5–21.5 cm: your wrist is inside that range.

Flat top = circumference ÷ 3.1, a community convention, not a measurement of your arm. Compact ≤ 0.75 of the flat top, balanced ≤ 0.89, at the edge ≤ 1. Compare more watches in the watch size calculator.

Casio AEQ-120: wrist fitCasio AEQ-120 on a wrist, top view to scale. case length (Casio L) 53.3 mm. Wrist 170 mm, estimated flat width 54.8 mm (circumference / 3.1). Ratio 0.97: at the edge.wrist, flat topwrist flat ≈ 54.8case length (Casio L) 53.3At the edge · 53.3 / 54.8 = 0.97estimate: wrist 170 / 3.1 = 54.8 flatcompactbalancededgeoverhang0.750.891
Casio AEQ-120 on a 17 cm wristDrawing from data, not a photo · mm

Actual size on your screen

Calibrate once with a bank card and the drawing shows the Casio AEQ-120 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Casio AEQ-120: size drawingCasio AEQ-120, round case, top and side view to scale: case diameter 52.2 mm, case length (Casio L) 53.3 mm, lug width — (unknown), thickness 16.8 mm. Bezel, dial and crown size are schematic.lug width —Ø 52.2case length (Casio L) 53.3TOPthickness 16.8SIDE
Drawing from data, not a photo · mm
01020304050

Casio AEQ-120 strap size

Casio publishes no lug width for the Casio AEQ-120; its band is cut for wrists of 145–215 mm wrist1. Measure between the lugs with a caliper before buying a third-party strap.

Attachment: not published in our sources.

Find your strap length in the watch strap size tool, with the Casio AEQ-120 filled in.

Same size as the Casio AEQ-120

The models nearest to the Casio AEQ-120 in case width and case length (L), drawn over it to scale; below, every model within 1 mm of its 53.3 mm.

Size comparison: Casio AEQ-120, Casio PRG-270, Casio GD-350, Casio AE-1500Top-view outlines to scale on one centre. A Casio AEQ-120: Ø 52.2, L 53.3, lug —, T 16.8. B Casio PRG-270: Ø 52.4, L 54.6, lug —, T 15 (vs A: Ø +0.2 L +1.3 T −1.8). C Casio GD-350: W 50.8, L 53.4, lug —, T 18 (vs A: W −1.4 L +0.1 T +1.2). D Casio AE-1500: W 51.2, L 54.4, lug —, T 15.7 (vs A: W −1 L +1.1 T −1.1).C W 50.8D W 51.2A Ø 52.2B Ø 52.4A L 53.3C L 53.4D L 54.4B L 54.6A Casio AEQ-120Ø 52.2 · L 53.3 · lug — · T 16.8B Casio PRG-270Ø 52.4 · L 54.6 · lug — · T 15vs A: Ø +0.2 L +1.3 T −1.8C Casio GD-350W 50.8 · L 53.4 · lug — · T 18vs A: W −1.4 L +0.1 T +1.2D Casio AE-1500W 51.2 · L 54.4 · lug — · T 15.7vs A: W −1 L +1.1 T −1.1
A Casio AEQ-120 and the 3 nearest in size, on one centre, to scaleDrawing from data, not a photo · mm

Nearest in size

  1. ACasio AEQ-120this watch
  2. BCasio PRG-270W +0.2 · L +1.3 · T −1.8 mm
  3. CCasio GD-350W −1.4 · L +0.1 · T +1.2 mm
  4. DCasio AE-1500W −1 · L +1.1 · T −1.1 mm

Differences against A in mm: W case width, L Casio case length, T thickness. Nearest by width and length together, from the published sizes.

Casio AEQ-120 questions

Where is the manual for the Casio AEQ-120?

The Casio AEQ-120 runs Casio module 5679, and Casio publishes the operation guide for that module as a PDF: Casio operation guide 5679. The module number is stamped on the case back.

How big is the Casio AEQ-120?

The Casio AEQ-120 measures 52.2 mm wide, 53.3 mm long (Casio's L, not lug to lug), 16.8 mm thick, 58 g.

Will the Casio AEQ-120 fit a 7.5-inch wrist?

Balanced: the Casio AEQ-120's 53.3 mm case length (L) takes 87% of the ~61.5 mm flat top of a 7.5-inch (19.1 cm) wrist. By the same estimate (circumference ÷ 3.1) it sits balanced from about 19 cm and overhangs the flat top on wrists under about 17 cm.

What battery does the Casio AEQ-120 take?

The Casio AEQ-120 takes CR2025, rated about 10 years.

What module is in the Casio AEQ-120?

The Casio AEQ-120 runs on the Casio module 5679. Casio's manual list puts 1 model codes on this module, 1 of them AEQ-120 codes.

What strap size does the Casio AEQ-120 take?

Casio does not publish the lug width for the Casio AEQ-120. What Casio does publish is a band size: wrists of 14.5–21.5 cm, the wrist circumference its own band is cut for. That is a wrist range, not a strap width, so measure between the lugs with a caliper before you buy a third-party strap.

Find the strap length for your wrist and the Casio AEQ-120 in the watch strap size tool.

More Casio watches

Sources

Documents checked · Report a wrong number

  1. 1Casio America — AEQ120W-1AV | Analog-Digital Black Watch | CASIO · html · read
  2. 2Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read