ArtCraft First Day Cover Special Edition for the Sperry Corporation.  Stamp # C114, Lawrence and Elmer Sperry on ArtCraft cover with FDC cancellation Garden City, NY.  Includes Sperry mounted protective envelope with information about the company and family, and outer Sperry envelope.  Have multiples.  Buy a bunch or all if you choose.  Condition looks terrific on all.  But I'm no expert, so will refrain from guessing.