Alden Shoes | 990 Genuine Shell CordovanAlden Shoes Plain Toe Blucher, using the centuries old method of pure vegetable tanning and hand finishing, the single tannery still producing genuine shell cordovan today is indeed practicing a rare art.?? The process takes a full six months to complete and produces leather that is soft and durable. Barrie Last Double oak leather outsoles Style: 990 Color: Dark Burgundy Shell Note: All Genuine Shell Cordovan has to be custom made. If not in stock