Receivers with the SG receiver code were intended for use by Inland though they were also used by Saginaw. The receiver code was soon changed to SG. Saginaw Receivers with SG Subcontractor Markings Receivers produced at the Saginaw plant under subcontract to Inland initially had the SI receiver code on the left side of the receiver below the wood line.
As were serial numbers from IP receivers that were scrapped Serial numbers IP had not yet used were used by S'G'. Irwin-Pedersen Numbers Reassigned to Saginaw at Grand Rapids Grand Rapids manufactured their own receivers as well as using viable IP marked and serialized receivers they had acquired in the takeover. Underwood name not lined out, Underwood s/n Underwood name removed, Winchester name & s/n The significance of the letter A is unclear. Two letters or in combination with an Underwood subcontractor code. Some have been reported with only one of the One or both of the letters of the W A or A W code may be difficult to see. If the receiver had an Underwood subcontractor code, the subtractor code was left in place between the W A or A W. Winchester added the letters W A or A W to the bevel of the receiver. Winchester sometimes lined out the Underwood name, sometimes not. Receivers that retained the Underwood name: Winchester removed the Underwood name and serial number, then replaced them with the Winchester name and serial number. Underwood receivers that had not yet been hardened: The focus at Winchester was meeting production quotas during a time of high demand. To find a receiver that doesn't fit these criteria. The information that follows has been reconstructed from the data collected so far. What followed was not always consistent and sometimes varied. These receivers were purchased by Winchester. Underwood had receivers in various stages of completion left over when their contract ended. There are a variety of reasons things may have been changed or simply ignored. Data collected over the years has sometimes conflicted with the information in these documents. Notice Tables C - F Documents found in the past have identified several prime contractors who assigned subsets of their serial numbers to their subcontractor(s). (4) Experimental Models: alternate designs experimenting with ways to reduce the time and cost of production
(3) Engineering Models: Pilot models made from Engineering Drawings (2) Toolroom Models: Pre-production carbines to test and finalize drawings for mass production (1) leftover carbines offered to Ordnance after a company name change and completion of the NPM contract It was in excellent shape and maintained.
I fully regret not taking that weapon when it was offered to me, but at the time I was in no position to store the M1. He sold it around 1988 in the Monmouth County area of New Jersey.
Folks - I came across some paperwork recently that listed the serial number of the M1 Inland my father had.The first was produced and delivered from late 1942 through until October 1943. The M1A1 was manufactured in two main production runs, both of approximately 70,000. Inland Manufacturing Division of General Motors was the only manufacturer of the M1A1 and manufactured approximately 140,000 by the close of the war. During WWII the M1A1 stocks and parts in the possession of Springfield Armory, whether made by Springfield or another manufacturer, were for use as replacements. Reassembly required the use of new rivets.