Casio produced their first scientific calculator watch in 1983, the CFX-20 (resin case) and CFX-200 (metal case) which, while getting rarer and more expensive, can still be found in varying condition on eBay without looking too hard.
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Then, in 1984 or 1985, they started producing watches with a membrane keypad, including databanks like the DBC-60/600, the thin CFS-80, accountant’s friend CBA-10 and, unfortunately, the updated scientific calculator watches CFX-40 (resin case) and CFX-400 (metal case).
The calculator watches with buttons that sat proud of the keypad, that had served them so well for five years across a range of different models including the original CFX watches, were far better than this replacement keypad that faded and cracked with use.
As a result, the CFX-40/400 is a real rarity in any condition, particularly if you’re seeking one with a usable keypad.
Some enthusiastic designers have come up with a partial workaround, producing replacement vinyl adhesive keypads to stick over the old ones but they don’t quite match the originals and are, themselves, quite fragile. Much like the after-market G-Shock bezels being produced in China and Brazil, they look good from a distance but not on closer inspection. However, they are definitely better than nothing.
The watch pictured here started life as a CFX-40 but the keypad had cracked and the numbers all but disappeared. The seller said it was worse before he had given the keypad a cursory spit and polish and, while it was able to be coaxed back into life, it’s pretty much unusable other than a basic 8-digit calculator if you can’t see the other symbols on the keys.
NOS cases appear on eBay very rarely and are quickly snapped up so I wasn’t particularly confident when putting out some feelers to see if I could find a replacement — I was quite sure the best I’d be able to find was one of the after-market vinyl keypad overlays.
But, occasionally miracles happen, and a Spanish seller had a NOS case for a CFX-400 with the white/yellow keypad. More incredible still he had a NOS black keypad as well which he bundled with it. Overall it was an expensive transaction, but the chances of finding another are not great so worth every cent.
Those familiar with the CFX-400 will be well-aware of the range of available functions it holds, and for mathematicians, engineers, and people who just like doing calculations in baseⁿ it’s in a class of its own. Other than the CFX-20/200 and a scientific calculator watch Citizen made, there’s nothing else like it. It’s features seem to parallel the widely-popular desktop calculator Casio FX-82, but having it on our wrist adds another dimension.
Obviously with the invention of smart watches, having a wristwatch calculator is not only possible, but has far more functionality than this. But the CFX-400 was made more than 30 years ago.
An excellent watch, well-deserving of the high prices good examples command on eBay.
Here’s the CFX-40 and 400 from the 1985 Casio catalogue, along with 1983’s CFX-200, the thin CFS-80 and two of the many QW437 variations, the CA-50 and CA-502.
Interestingly, the catalog has the CFX-400 with a very white keypad — I’ve never seen a real one with a keypad this white and even NOS ‘white’ keypads tend to have a yellow tint. The stark white looks very nice though and blends well with the silver case.
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Android™ 6.0, a C-MOS imager and toughness combined in a single device
The IT-G400 handheld terminal uses the Android™ 6.0 platform.
It combines advanced technology and usability with toughness and a scanner function.
Power-saving design for extended operation
The IT-G400 series is suited to applications requiring use for long periods of time. A large-capacity 5800 mAh battery that comes standard on some models* provides powerful battery life, and the battery is exchangeable.
- Equipped models: IT-G400-C21L/WC21L. The large-capacity battery (5800 mAh) is available as an option for the IT-G400-C21M/WC21M.
The IT-G400 is equipped to read a wide variety of 1D and 2D code symbologies. Use of the latest module and decoder improves performance on hard-to-read codes, increases depth of field, and increases hand jitter tolerance.
Scanning of hard-to-read codes
Improved module and decoder performance has increased accuracy in reading hard-to-read codes, such as lightly printed, faded, blurred, or soiled images.
A rugged body capable of withstanding a drop from 1.5 meters and compliant with IP67*
The IT-G400 is equipped with a special scratch-resistant and crack-resistant glass, has a shock-resistant structure that provides durability to withstand a drop from 1.5 meters, and provides IP67 dust and water protection. It is suitable for use in demanding environments, including outdoors in the rain and dusty warehouses.
- No ingress of dust. No ingress of water even if temporarily immersed in water under defined conditions of pressure when all covers for connectors, etc. are closed. Dust and water resistance are measured using CASIO’s testing method. Performance deteriorates due to aging and drop impact and is not guaranteed.
-20°C to 50°C* operating temperature range
The IT-G400 is designed for reliable operation in a variety of usage environments ranging from warehouses in sub-zero temperatures to places under the blazing sun.
- The camera flash operating temperature range is -10°C to 50°C.
The IT-G400 is an industrial business support device suitable for wide-ranging applications. Some models feature LTE communication capability for high-speed data communication and a voice communication function that provide the functionality required for outdoor work and a GPS function capable of acquiring position information.
- Equipped models: IT-G400-WC21L/WC21M
The IT-G400 is equipped with a large 5-inch LCD touchscreen and supports screen rotation for switching between portrait mode and landscape mode. In addition, highly legible, easy-to-operate business applications support efficient business operation.
Hardware keys ensure smooth operation even if software keys are hidden when the screen is enlarged.
Equipped with Android™ 6.0
The IT-G400 is equipped with the Android™ 6.0 operating system and a 1.2 GHz Quad Core CPU that delivers high-speed processing and come with a generous 2 GB of RAM and 16 GB of flash ROM. It has ample memory to store user applications and other resources and are suited to a variety of operating requirements.
Casio Up-400 Printer Driver
Compatible with Google Mobile Services
The IT-G400 provides access to convenient Google apps, including Google Play and Google Maps. Gmail, Google Drive (a virtual drive), and Chrome (a browser), services already introduced by many companies, are also available.
Supports business applications for the Android™ OS
The IT-G400 supports a variety of business applications and cloud systems developed for Android™, such as apps for communication, receiving and shipping management, purchase ordering, and voice recognition. Applications can be rapidly deployed.
- Not all applications are guaranteed to run.
SAM slot* and built-in NFC reader/writer
The IT-G400 is equipped with a smart card reader/writer that supports NFC. They can read various types of information from contactless smart cards, a capability that expands the scope of application to areas such as customer service enhancement using membership cards and security enhancement via card authentication. A SAM (Secure Access Module) slot comes as a standard feature as well. Installing a SAM card enables use for applications that require a higher level of security, such as preventing unauthorized use of smart cards.
- Planned for January 2018
Mobile device management
The IT-G400 supports MobiControl®, a mobile device management (MDM) tool widely used worldwide. It comes with a function independently developed by CASIO for completing everything from Wi-Fi settings to device registration by reading QR codes. Available only in the IT-G400, this function greatly reduces the time and effort of kitting and simplifies device management, operation, and maintenance. Furthermore, it supports security measures against malware and other threats. This versatile feature provides support for all aspects of business mobility.
MobiControl Stage comes pre-installed*
- An installer icon is bundled as a standard feature, eliminating the need for agent application installers
- MobiControl Stage enables downloading of the latest device agents.
- Equipped with a simple function available only in the IT-G400 that makes it possible to perform everything from device initialization to maintenance by reading QR codes
- Planned for January 2018
A library of tools that support efficient operation
Casio Up-400 Printer
A lineup of unique tools from CASIO invaluable for trouble-free device management and operation
A software trigger key for scanning is displayed on the screen. The key can be placed in the desired position and is always displayed in the foreground for improved scanning operability.
Casio Up-400 Printer
- These programs are sample program. Therefore, please check enough by yourself and use it.
For business applications that require no keyboard input, the software input panel can be hidden to enable efficient scanning input using a wide screen.
Casio Up-400
- These programs are sample program. Therefore, please check enough by yourself and use it.
The power launcher locks the display other than the home screen and prevents the display of the settings screen, which is unnecessary for operation. It is useful for security measures such as preventing information leakage.
KITTING TOOL
A microSD card containing settings files and applications can be used for kitting multiple terminals. This makes it simple to install applications, configure individual settings, and hide apps or other content.