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Casio watch · digital module

Casio LA670W manual and battery (CR1216)

Casio's operation guide for the Casio LA670W is the PDF for module 3191: Casio operation guide 3191 (PDF) ↗. It takes a CR1216 battery. The case is 24.6 mm wide, 30.3 mm long (case length L, not lug to lug), and 7.3 mm thick.

Sources checked · How we source numbers
Width (W)
24.6 mm1
Case length (L)
30.3 mm1
not lug to lug
Thickness
7.3 mm1
Lug width
not published by Casio
Casio LA670W: size drawingCasio LA670W, rect case, top and side view to scale: case width 24.6 mm, case length (Casio L) 30.3 mm, lug width — (unknown), thickness 7.3 mm. Bezel, dial and crown size are schematic.lug width —width 24.6case length (Casio L) 30.3TOPthickness 7.3SIDE
Casio LA670W, top and side, to scaleDrawing from data, not a photo · mm

Module 3191 twins

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

Codes of the Casio LA670W family[3]LA670WA, LA670WGA

2 more codes on the same module

LA-11WB, LA-11WL

Casio module 3191: functions, battery and manual

Module: Casio module 3191

The Casio LA670W runs on the Casio module 3191, a digital module.

Power source
battery2
Battery life
2 years2
Accuracy
±30 s/month2

Battery

Casio LA670W specifications

Case width (W)
24.6 mm1
Lug to lug
not published by Casio; see case length (L)
Case length (L)
30.3 mm1Casio's L of L × W × H, measured differently from lug to lug; we never swap one for the other.
Thickness (H)
7.3 mm1
Lug width
not published by Casio
Weight
27.8 g1
Crystal
Resin Glass1
Water resistance
Water Resistant1
Module
Casio module 31913 · digital moduleCasio module 3191 specs
Battery
Accuracy
±30 s/month1
Years made
start not published
Case code
not used by Casio: the module number (module 3191) identifies the watch
Band fits
140–185 mm wrist1

On your wrist

The verdict compares the case length (L) with the flat top of your wrist. Balanced from ~11 cm, past the edges below ~9.5 cm.

= 6.7 in

Compact on a 17 cm wrist: the 30.3 mm case length (L) covers 55% 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 14–18.5 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 LA670W: wrist fitCasio LA670W on a wrist, top view to scale. case length (Casio L) 30.3 mm. Wrist 170 mm, estimated flat width 54.8 mm (circumference / 3.1). Ratio 0.55: compact.wrist, flat topwrist flat ≈ 54.8case length (Casio L) 30.3Compact · 30.3 / 54.8 = 0.55estimate: wrist 170 / 3.1 = 54.8 flatcompactbalancededgeoverhang0.750.891
Casio LA670W 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 LA670W at 1:1, next to a millimetre ruler.

1:1 · not calibrated: sizes are approximate
Casio LA670W: size drawingCasio LA670W, rect case, top and side view to scale: case width 24.6 mm, case length (Casio L) 30.3 mm, lug width — (unknown), thickness 7.3 mm. Bezel, dial and crown size are schematic.lug width —width 24.6case length (Casio L) 30.3TOPthickness 7.3SIDE
Drawing from data, not a photo · mm
01020304050

Casio LA670W strap size

Casio publishes no lug width for the Casio LA670W; its band is cut for wrists of 140–185 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 LA670W filled in.

Same size as the Casio LA670W

The models nearest to the Casio LA670W in case width and case length (L), drawn over it to scale; below, every model within 1 mm of its 30.3 mm.

Size comparison: Casio LA670W, Casio A158W, Casio A-159, Casio LW-200Top-view outlines to scale on one centre. A Casio LA670W: W 24.6, L 30.3, lug —, T 7.3. B Casio A158W: W 33.2, L 36.8, lug 18, T 8.2 (vs A: W +8.6 L +6.5 T +0.9). C Casio A-159: W 33.2, L 36.8, lug —, T 8.5 (vs A: W +8.6 L +6.5 T +1.2). D Casio LW-200: Ø 34.9, L 37.9, lug —, T 11.9 (vs A: W +10.3 L +7.6 T +4.6).A W 24.6B W 33.2C W 33.2D Ø 34.9A L 30.3B L 36.8C L 36.8D L 37.9A Casio LA670WW 24.6 · L 30.3 · lug — · T 7.3B Casio A158WW 33.2 · L 36.8 · lug 18 · T 8.2vs A: W +8.6 L +6.5 T +0.9C Casio A-159W 33.2 · L 36.8 · lug — · T 8.5vs A: W +8.6 L +6.5 T +1.2D Casio LW-200Ø 34.9 · L 37.9 · lug — · T 11.9vs A: W +10.3 L +7.6 T +4.6
A Casio LA670W and the 3 nearest in size, on one centre, to scaleDrawing from data, not a photo · mm

Nearest in size

  1. ACasio LA670Wthis watch
  2. BCasio A158WW +8.6 · L +6.5 · T +0.9 mm
  3. CCasio A-159W +8.6 · L +6.5 · T +1.2 mm
  4. DCasio LW-200W +10.3 · L +7.6 · T +4.6 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 LA670W questions

Where is the manual for the Casio LA670W?

The Casio LA670W runs Casio module 3191, and Casio publishes the operation guide for that module as a PDF: Casio operation guide 3191. The module number is stamped on the case back. All of the module’s models and its battery are on its page.

What battery does the Casio LA670W take?

The Casio LA670W takes CR1216, rated about 2 years.

How big is the Casio LA670W?

The Casio LA670W measures 24.6 mm wide, 30.3 mm long (Casio's L, not lug to lug), 7.3 mm thick, 27.8 g.

Will the Casio LA670W fit a 4.5-inch wrist?

Balanced: the Casio LA670W's 30.3 mm case length (L) takes 82% of the ~36.9 mm flat top of a 4.5-inch (11.4 cm) wrist. By the same estimate (circumference ÷ 3.1) it sits balanced from about 11 cm and overhangs the flat top on wrists under about 9.5 cm.

What module is in the Casio LA670W?

The Casio LA670W runs on the Casio module 3191, a digital module. Casio's manual list puts 4 model codes on this module, 2 of them LA670W codes.

What strap size does the Casio LA670W take?

Casio does not publish the lug width for the Casio LA670W. What Casio does publish is a band size: wrists of 14–18.5 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 LA670W in the watch strap size tool.

More Casio watches

Sources

Documents checked · Report a wrong number

  1. 1Casio America — LA670WGA-9 | CASIO VINTAGE Gold | CASIO (product page) · html · read
  2. 2Casio Computer Co., Ltd. — Operation guide, module 3191 (qw3191_EN.pdf) · pdf · read
  3. 3Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read