We have the transaction log (*.ldf) file with recovery option: full. But there is no backup of the database between between Dec -06 and June 12.

This is what I have:

db.ldf...

Yes, the last full database backup that we have is from Dec. 06

There are no diffierential backups. 

After I restore the database from...

Please check this tech note from support.microsoft.com

http://support.microsoft.com/default.aspx?scid=kb;en-us;311111