Casio BM-200 is a digital wristwatch released around 1992. It used module 983 and continued the barometer line introduced by the BM-100. The watch has a rounded early-90s case, a black-and-orange color scheme, and a front sensor cover shaped like a mask.

The BM-200 was created as the next step after the BM-100. It replaced the depth meter with trekking features such as ascent and descent speed, and it introduced a more futuristic design inspired by early G-Shock styling. The LCD has a small pixel matrix that shows simple animations in each mode, and the front plate with the SENSOR label gives the watch a strong “robot mask” look that collectors compare to the G-Shock DW-001 Jason. Although the BM-200 never reached the popularity of G-Shock or early ProTrek models, it is now valued as a rare experimental piece from Casio’s sensor era.

Casio BM-200 – Quick Technical Data

Field	Data
Model	Casio BM-200
Module	983
Battery	2× SR927SW (395 equivalent)
Manual	Not available online – If you have one please share it with the community 😉
Glass Type	Acrylic
Strap Size	18 mm (lug) / 23.5 mm (case)
Case Material	Resin case, mask-style front sensor housing
Functions	Barometer, trend graph, altimeter, ascent/descent speed, 3 alarms, hourly signal, stopwatch, 12/24h, 100 m WR
Production Years	Make date: 8 January 1992 (approx. 1991–1992 release)

What color versions of Casio BM-200 exist?

The Casio BM-200 was released in only one color variant. All examples share the same black case, the same mask-style sensor front, and the same orange accents that define the look of this model. Because there is only one version, condition plays a much bigger role in collectibility.

1. BM-200 Black with Orange Accents (only version)

• Black resin case and strap.
• Orange side buttons and orange text around the display.
• Large front sensor cover shaped like a mask.
• White SENSOR print on the front module.

Collectioner tip 💡

The SENSOR marking wears off very easily. Collectors use it as a fast condition indicator.
• Intact SENSOR text = excellent, lightly used watch.
• Faded or missing SENSOR text = heavy use or long-term wear.

About the Casio BM-200 sensor system

The Casio BM-200 uses the same pressure-sensor concept that started with the BM-100. The sensor measures atmospheric pressure and displays the trend on the screen, and it also powers the altimeter. In the BM-200 the depth meter was removed, and Casio introduced a new feature that calculates ascent and descent speed during hiking.

The sensor sits behind the large mask-like front cover, which is the most recognizable detail of the watch. This cover protects the sensor and gives the BM-200 its “robot face” look. The SENSOR text printed on the front is very fragile and often fades with time. A clear and readable SENSOR label usually means the watch was used very lightly.

The barometer works in millibars, and the watch shows a small pressure trend graph in time mode. The altimeter works in the same way as in the BM-100. Changes in air pressure change the altitude reading. The BM-200 also shows small animations on the green pixel matrix, which was an unusual feature for early 90s Casio models and one of the visual highlights of this watch.

Functions of the Casio BM-200

The Casio BM-200 offers a mix of classic digital functions and outdoor features built around its pressure sensor. It was designed as a trekking-oriented successor to the BM-100, with a stronger focus on altitude changes rather than underwater use.

Time mode

• Standard time display with seconds
• Date, weekday and 12/24-hour format
• Small pressure trend graph on the right side of the screen

Barometer

• Measures atmospheric pressure in millibars
• Shows short-term pressure changes
• Helps predict weather conditions during hiking

Altimeter

• Calculates altitude using pressure changes
• Simple to use and similar in operation to the BM-100
• Works best during clear, stable weather

Ascent and descent speed

• A key function that makes the BM-200 different from the BM-100
• Uses the altimeter and stopwatch together
• Shows your climbing or descending speed in meters per hour or minute
• Very useful for mountain walking, cycling, or tracking elevation changes

Alarms and signal

• Three independent alarms
• Hourly time signal
• Easy to operate thanks to large buttons

Stopwatch

• Standard 1/100 stopwatch
• Works together with the green pixel matrix animations, which change depending on the mode

Light

• Simple LED with a warm tone
• Enough to read the screen in the dark

Water resistance

• Rated to 100 m, suitable for everyday use and surface swimming

Production years and model background

The Casio BM-200 appeared around 1991–1992, with a documented make date of 8 January 1992. It was designed as the successor to the BM-100, the first Casio watch with a pressure sensor. Casio introduced a new rounded case shape, larger buttons and a more aggressive front plate to match the early-90s design language seen in the first G-Shock experiments.

The BM-200 was intended to push the BM series further into the outdoor segment. It removed the depth meter from the BM-100 and replaced it with an ascent and descent speed function aimed at hikers and mountain users. The front sensor cover became the dominant design feature of the watch, giving it a “mask-like” appearance that collectors often compare to the G-Shock DW-001 “Jason”.

Although its design was bold and technically interesting, the BM-200 did not achieve strong commercial success. The G-Shock line grew rapidly in the same period, and early ProTrek concepts began to appear shortly after. As a result, the BM-200 remained a niche model, known mostly to enthusiasts.

Today it is valued for its unusual look, its early-90s sci-fi style, and its role as one of Casio’s most experimental barometer watches.

Other BM watches and model evolution

The Casio BM-200 belongs to the small BM family, a group of early pressure-sensor watches that started with the BM-100 in 1989. All models share the same idea: a single pressure sensor that reads the weather trend and altitude. Each generation changed the design and the extra functions, but the core concept stayed the same.

BM-100 (1989)

The BM-100 was the first Casio with a barometer. It offered a barometer, a trend graph, an altimeter and a very rare depth meter. It used modules 510 and 560 and is often described as the “zero-generation ABC”, because it introduced functions that later appeared in the ProTrek line.

BM-200 (1991–1992)

The BM-200 is the direct successor to the BM-100. It kept the barometer, altimeter and trend graph but removed the depth meter. Casio added a new ascent and descent speed function and redesigned the case with a rounded early-90s look. The front sensor cover has a “mask-like” style, which makes the BM-200 one of the most unique models in the series.

BM-500 (early 90s)

The BM-500 continued the full-sensor concept from the BM-100. It kept the barometer, altimeter and depth meter but changed the display to an analog-digital layout with colored scales and bar indicators. It is often described as the more “instrument-like” path of the BM family.

BM-600 / BM-610 (1995)

The BM-600 and BM-610 represent the last generation. They dropped the depth meter and focused on barometer and altimeter functions, similar to the BM-200. The case shape is closer to early ProTrek designs, with a large graphic display and an oval screen. These models act as a bridge between the BM series and the later ProTrek line.

The BM-200 sits exactly in the middle of this evolution, combining the original idea with a bolder look from the early 90s.

FAQ – Casio BM-200