Introduced in 1997, the CZ-97B is a .45ACP caliber addition to CZ’s line of globally popular handguns. However, the 97 has some substantial mechanical differences from the CZ-75 line. Most significantly, it locks on the front of the chamber and the ejection port instead of having locking lugs cut into the top of the barrel and underside of the slide. It also has a threaded and removable barrel bushing, unlike the 75s. This is an early 1998 production example, with wooden grips, no front slide serrations, and a solid front sight (newer examples have thinner aluminum grips, front serrations, and a fiber optic front sight).
The CZ97 has never been particular hot or popular, in large part I suspect because of its overall size coupled with a 10-round magazine. During the AWB when it was introduced in the US (and I’m sure the US is a primary market for a .45ACP CZ) this was not so much of a liability, but today there are many other options for a full-size .45ACP handgun with significantly more capacity.