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Casio watch · analog-digital module

Casio GA-2000 manual and battery (SR726SW)

Casio's operation guide for the Casio GA-2000 is the PDF for module 5590: Casio operation guide 5590 (PDF) ↗. It takes an SR726SW battery. The case is 47 mm wide, 51.2 mm long (case length L, not lug to lug), and 14.1 mm thick.

Sources checked · How we source numbers
Width (W)
47 mm1
Case length (L)
51.2 mm1
not lug to lug
Thickness
14.1 mm1
Lug width
not published by Casio
Casio GA-2000: size drawingCasio GA-2000, cushion case, top and side view to scale: case width 47 mm, case length (Casio L) 51.2 mm, lug width — (unknown), thickness 14.1 mm. Bezel, dial and crown size are schematic.lug width —width 47case length (Casio L) 51.2TOPthickness 14.1SIDE
Casio GA-2000, top and side, to scaleDrawing from data, not a photo · mm

Module 5590 twins

Casio's manual list puts 9 model codes on this module: same functions, same manual, often the same battery.

Codes of the Casio GA-2000 family[3]GA-2000, GA-2000BT, GA-2000E, GA-2000GZ, GA-2000HC, GA-2000S, GA-2000SKE, GA-2000SU, GA-2000WM

Casio module 5590: functions, battery and manual

Module: Casio module 5590

The Casio GA-2000 runs on the Casio module 5590, an analog-digital module.

Power source
battery2
Battery life
3 years2
Accuracy
±15 s/month2
Light
Double LED (light-emitting diode)2

Battery

Casio GA-2000 strap size

Casio publishes no lug width for the Casio GA-2000. 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 GA-2000 filled in.

Casio GA-2000 specifications

Case width (W)
47 mm1
Lug to lug
not published by Casio; see case length (L)
Case length (L)
51.2 mm1Casio's L of L × W × H, measured differently from lug to lug; we never swap one for the other.
Thickness (H)
14.1 mm1
Lug width
not published by Casio
Weight
64 g1
Crystal
Mineral Glass1
Water resistance
200 m1
Module
Casio module 55903 · analog-digital moduleCasio module 5590 specs
Battery
Accuracy
±15 s/month1
Years made
start not published
Case code
not used by Casio: the module number (module 5590) identifies the watch

On your wrist

The verdict compares the case length (L) with the flat top of your wrist. Balanced from ~18 cm, past the edges below ~16 cm.

= 6.7 in

At the edge on a 17 cm wrist: the 51.2 mm case length (L) covers 93% 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.

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 GA-2000: wrist fitCasio GA-2000 on a wrist, top view to scale. case length (Casio L) 51.2 mm. Wrist 170 mm, estimated flat width 54.8 mm (circumference / 3.1). Ratio 0.93: at the edge.wrist, flat topwrist flat ≈ 54.8case length (Casio L) 51.2At the edge · 51.2 / 54.8 = 0.93estimate: wrist 170 / 3.1 = 54.8 flatcompactbalancededgeoverhang0.750.891
Casio GA-2000 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 GA-2000 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Casio GA-2000: size drawingCasio GA-2000, cushion case, top and side view to scale: case width 47 mm, case length (Casio L) 51.2 mm, lug width — (unknown), thickness 14.1 mm. Bezel, dial and crown size are schematic.lug width —width 47case length (Casio L) 51.2TOPthickness 14.1SIDE
Drawing from data, not a photo · mm
01020304050

Same size as the Casio GA-2000

The models nearest to the Casio GA-2000 in case width and case length (L), drawn over it to scale; below, every model within 1 mm of its 51.2 mm.

Size comparison: Casio GA-2000, Casio DW-290, Casio AWG-M100, Casio AE-2000Top-view outlines to scale on one centre. A Casio GA-2000: W 47, L 51.2, lug —, T 14.1. B Casio DW-290: Ø 46.8, L 50.6, lug —, T 14.3 (vs A: W −0.2 L −0.6 T +0.2). C Casio AWG-M100: W 46.4, L 52, lug —, T 14.9 (vs A: W −0.6 L +0.8 T +0.8). D Casio AE-2000: Ø 47.7, L 52.2, lug —, T 16 (vs A: W +0.7 L +1 T +1.9).C W 46.4B Ø 46.8A W 47D Ø 47.7B L 50.6A L 51.2C L 52D L 52.2A Casio GA-2000W 47 · L 51.2 · lug — · T 14.1B Casio DW-290Ø 46.8 · L 50.6 · lug — · T 14.3vs A: W −0.2 L −0.6 T +0.2C Casio AWG-M100W 46.4 · L 52 · lug — · T 14.9vs A: W −0.6 L +0.8 T +0.8D Casio AE-2000Ø 47.7 · L 52.2 · lug — · T 16vs A: W +0.7 L +1 T +1.9
A Casio GA-2000 and the 3 nearest in size, on one centre, to scaleDrawing from data, not a photo · mm

Nearest in size

  1. ACasio GA-2000this watch
  2. BCasio DW-290W −0.2 · L −0.6 · T +0.2 mm
  3. CCasio AWG-M100W −0.6 · L +0.8 · T +0.8 mm
  4. DCasio AE-2000W +0.7 · L +1 · T +1.9 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 GA-2000 questions

Where is the manual for the Casio GA-2000?

The Casio GA-2000 runs Casio module 5590, and Casio publishes the operation guide for that module as a PDF: Casio operation guide 5590. The module number is stamped on the case back. All of the module’s models and its battery are on its page.

How big is the Casio GA-2000?

The Casio GA-2000 measures 47 mm wide, 51.2 mm long (Casio's L, not lug to lug), 14.1 mm thick, 64 g.

Will the Casio GA-2000 fit a 7.5-inch wrist?

Balanced: the Casio GA-2000's 51.2 mm case length (L) takes 83% 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 18 cm and overhangs the flat top on wrists under about 16 cm.

What battery does the Casio GA-2000 take?

The Casio GA-2000 takes 2 × SR726SW, rated about 3 years.

What module is in the Casio GA-2000?

The Casio GA-2000 runs on the Casio module 5590, an analog-digital module. Casio's manual list puts 9 model codes on this module, 9 of them GA-2000 codes.

More Casio watches

Sources

Documents checked · Report a wrong number

  1. 1Casio America — GA2000-2A | Black Analog-Digital Men's Watch - G-SHOCK | CASIO (product page) · html · read
  2. 2Casio Computer Co., Ltd. — Operation Guide 5590 (qw5590_EN.pdf) · pdf · read
  3. 3Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read