Prerequisites:  

– admin account & password  
– AFP-share & IP-address

1. Boot the Computer into recovery mode.
2. Open Terminal in the Utilities menu
3. At the prompt enter: `cd /Volumes`
4. Create a sub-directory in Volumes as a mount point for your time machine share:  
`mkdir TimeMachine`
5. Enter `cd TimeMachine`
6. Enter `pwd`. pwd should show /Volumes/TimeMachine
7. Mount the network share with your admin loginname & password:
 
        mount -t afp afp://adminname:password@ServerIPAddress/ShareName /Volumes/TimeMachine
 Example: 

        mount -t afp afp://myadminname:[email protected]/TimeMachineShare /Volumes/TimeMachine
Your password mustn't contain any "illegal" characters like :@\/.
8. Enter: `ls -la`. Note the exact name of your sparsebundle.
9. Enter: `hdid /Volumes/TimeMachine/NameOfYourSparseBundle`.
You may enter the first letters of the sparsebundle name and then hit <kbd>TAB</kbd>.
Hitting tab should autocomplete the Time Machine sparsebundle name. It may not look the same as it is displayed above as it escapes spaces and special characters.
10. If it auto completes the name then hit return. 
When this returns to the prompt it has opened the sparsebundle.
11. Enter `exit` and <kbd>⏎</kbd> and quit Terminal.
12. Select `Restore from a Time Machine backup` and click Continue.
13. After a search it should show you the Time Machine Backups directory as a volume that contains your backup.
14. Select that and click Continue.
15. In the next screen you will see all the backups that you can restore from listed by time and date.
16. Select the backup you want to restore.