My Dad's .32 S&W

[Parabellus]

Hello again,

This was my father's revolver that he passed to my mother who passed it to my sister. It looks like a Smith & Wesson GTGE about which I am, of course, clueless except that it is likely to be older than I am. Can you help identify it beyond the obvious and give an idea if my sister has something of value here.
Thank you once again for your help.

Russell