In the case of wanting to restore a SharePoint content database, etc. from one server to another or from a previous backup (and patches have since been applied), you would find your current build information by opening/checking the following:
- Open SharePoint Central Administration (this post applies to Windows SharePoint Services 3.0 (WSS) and Microsoft Office SharePoint Server 2007 (MOSS)
- Select the Operations Tab
- Under ‘Topology and Services’, choose ‘Servers in Farm’
- View the information under ‘version’ (screen shot below)
As well, a great reference for all current WSS and MOSS Versions and builds, as per hotfix and patches installed is available here, by Penny Coventry: http://www.mindsharpblogs.com/penny/articles/481.aspx