This listing is for a Single Antique Double Bit Key CORBIN 06. It was patented in 1887. THIS KEY WILL FIT A ROLL-TOP DESK WITH THE SAME KEY-CODE. It was also used on other antiques.We have Hundreds of Original Antique & Vintage Trunk Keys and we hunt for them everyday. Let us know if we can help you find a key to your antique trunk! Thanks for stopping by. Check Our Current Listings for Cool Keys, Old Watches and other Needful Thin...gs. Peace!!