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Casio watch · analog-digital module

Casio GG-B100 manual and battery (CR2025)

Casio's operation guide for the Casio GG-B100 is the PDF for module 5594: Casio operation guide 5594 (PDF) ↗. It takes a CR2025 battery. The case is 51.3 mm wide, 55.4 mm long (case length L, not lug to lug), and 19.4 mm thick.

Sources checked · How we source numbers
Width (W)
51.3 mm1
Case length (L)
55.4 mm1
not lug to lug
Thickness
19.4 mm1
Lug width
not published by Casio
Casio GG-B100: size drawingCasio GG-B100, cushion case, top and side view to scale: case width 51.3 mm, case length (Casio L) 55.4 mm, lug width — (unknown), thickness 19.4 mm. Bezel, dial and crown size are schematic.lug width —width 51.3case length (Casio L) 55.4TOPthickness 19.4SIDE
Casio GG-B100, top and side, to scaleDrawing from data, not a photo · mm

Module 5594 twins

Casio's manual list puts 4 model codes on this module: same functions, same manual, often the same battery.

Codes of the Casio GG-B100 family[3]GG-B100, GG-B100BA, GG-B100BTN, GG-B100Y

Casio module 5594: functions, battery and manual

Module: Casio module 5594

The Casio GG-B100 runs on the Casio module 5594, an analog-digital module.

Power source
battery2
Battery life
2 years2
Accuracy
±15 s/month2

Battery

Casio GG-B100 specifications

Case width (W)
51.3 mm1
Lug to lug
not published by Casio; see case length (L)
Case length (L)
55.4 mm1Casio's L of L × W × H, measured differently from lug to lug; we never swap one for the other.
Thickness (H)
19.4 mm1
Lug width
not published by Casio
Weight
92 g1
Crystal
Mineral Glass1
Water resistance
200 m1
Module
Casio module 55943 · analog-digital moduleCasio module 5594 specs
Battery
Accuracy
±15 s/month1
Years made
start not published
Case code
not used by Casio: the module number (module 5594) identifies the watch

On your wrist

The verdict compares the case length (L) with the flat top of your wrist. Balanced from ~19.5 cm, past the edges below ~17.5 cm.

= 6.7 in

Overhangs on a 17 cm wrist: the 55.4 mm case length (L) covers 101% of an estimated 54.8 mm flat top and runs 0.3 mm past it on each side.

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 GG-B100: wrist fitCasio GG-B100 on a wrist, top view to scale. case length (Casio L) 55.4 mm. Wrist 170 mm, estimated flat width 54.8 mm (circumference / 3.1). Ratio 1.01: overhangs, 0.3 mm past the flat wrist on each side.wrist, flat topwrist flat ≈ 54.8case length (Casio L) 55.4Overhangs · 55.4 / 54.8 = 1.01 · overhang 0.3 per sideestimate: wrist 170 / 3.1 = 54.8 flatcompactbalancededgeoverhang0.750.891
Casio GG-B100 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 GG-B100 at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Casio GG-B100: size drawingCasio GG-B100, cushion case, top and side view to scale: case width 51.3 mm, case length (Casio L) 55.4 mm, lug width — (unknown), thickness 19.4 mm. Bezel, dial and crown size are schematic.lug width —width 51.3case length (Casio L) 55.4TOPthickness 19.4SIDE
Drawing from data, not a photo · mm
01020304050

Casio GG-B100 strap size

Casio publishes no lug width for the Casio GG-B100. 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 GG-B100 filled in.

Same size as the Casio GG-B100

The models nearest to the Casio GG-B100 in case width and case length (L), drawn over it to scale; below, every model within 1 mm of its 55.4 mm.

Size comparison: Casio GG-B100, Casio GA-100, Casio GA-110, Casio AE-1500Top-view outlines to scale on one centre. A Casio GG-B100: W 51.3, L 55.4, lug —, T 19.4. B Casio GA-100: W 51.2, L 55, lug —, T 16.9 (vs A: W −0.1 L −0.4 T −2.5). C Casio GA-110: W 51.2, L 55, lug —, T 16.9 (vs A: W −0.1 L −0.4 T −2.5). D Casio AE-1500: W 51.2, L 54.4, lug —, T 15.7 (vs A: W −0.1 L −1 T −3.7).B W 51.2C W 51.2D W 51.2A W 51.3D L 54.4B L 55C L 55A L 55.4A Casio GG-B100W 51.3 · L 55.4 · lug — · T 19.4B Casio GA-100W 51.2 · L 55 · lug — · T 16.9vs A: W −0.1 L −0.4 T −2.5C Casio GA-110W 51.2 · L 55 · lug — · T 16.9vs A: W −0.1 L −0.4 T −2.5D Casio AE-1500W 51.2 · L 54.4 · lug — · T 15.7vs A: W −0.1 L −1 T −3.7
A Casio GG-B100 and the 3 nearest in size, on one centre, to scaleDrawing from data, not a photo · mm

Nearest in size

  1. ACasio GG-B100this watch
  2. BCasio GA-100W −0.1 · L −0.4 · T −2.5 mm
  3. CCasio GA-110W −0.1 · L −0.4 · T −2.5 mm
  4. DCasio AE-1500W −0.1 · L −1 · T −3.7 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 GG-B100 questions

Where is the manual for the Casio GG-B100?

The Casio GG-B100 runs Casio module 5594, and Casio publishes the operation guide for that module as a PDF: Casio operation guide 5594. 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 GG-B100?

The Casio GG-B100 measures 51.3 mm wide, 55.4 mm long (Casio's L, not lug to lug), 19.4 mm thick, 92 g.

Will the Casio GG-B100 fit an 8-inch wrist?

Balanced: the Casio GG-B100's 55.4 mm case length (L) takes 85% of the ~65.5 mm flat top of an 8-inch (20.3 cm) wrist. By the same estimate (circumference ÷ 3.1) it sits balanced from about 19.5 cm and overhangs the flat top on wrists under about 17.5 cm.

What battery does the Casio GG-B100 take?

The Casio GG-B100 takes CR2025, rated about 2 years.

What module is in the Casio GG-B100?

The Casio GG-B100 runs on the Casio module 5594, an analog-digital module. Casio's manual list puts 4 model codes on this module, 4 of them GG-B100 codes.

More Casio watches

Sources

Documents checked · Report a wrong number

  1. 1Casio America — GGB100-1A | Black Mudmaster Men's Watch G-SHOCK | CASIO · html · read
  2. 2Casio Computer Co., Ltd. — Operation Guide 5594 (qw5594_EN.pdf) · pdf · read
  3. 3Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read