Is the Casio DBC-611-1DF worth it over a basic digital Casio?

It costs more than a plain digital Casio because of the data bank and the stainless steel bracelet. If you want the memory functions and the metal look, it is the better pick; if you only need time and date, a simpler model does the same job.

How much can the data bank store?

The data bank holds a set of names, phone numbers and short memos, entered through the keypad. It is meant for quick reference, not as a replacement for a phone's contact list.

Does it need charging?

No. It runs on a button-cell battery with quartz movement and lasts years under normal use, so there is nothing to plug in.

It has everyday water resistance for splashes and hand washing, not for swimming or diving. Do not press the buttons underwater.

The watch comes new in box with tags. Check the listing for the included paperwork and packaging.

How does it compare with the original Casio Data Bank?

It keeps the slim rectangular case, keypad and metal bracelet of the original line with modern quartz internals. The layout is familiar to anyone who owned the older model.