10/29/19 - Original, USGI Arched & Checkered Mainspring Housing with Lanyard Loop. Original parkerized finish. Made for the M1911A1 Pistol. This is a Type 3 mainspring housing with 27 diamonds in the center row used on early Colt and Ithaca Pistols. All internals and pins are included. Complete part. Excellent, usable condition.