gilt-edged

adjective

1. having the edge or edges gilded: gilt-edged paper.
2. of the highest or best quality, kind, etc.
3. Finance.
   1. (of securities and bonds) of the highest rating or quality; secure.
   2. (of bonds) government backed or guaranteed.

adjective

1. stock exchange denoting government securities on which interest payments will certainly be met and that will certainly be repaid at par on the due date
2. of the highest qualitythe last track on the album is a gilt-edged classic
3. (of books, papers, etc) having gilded edges