Dannyjunkfish,
On your COLT Letter, if it is not too late, ask the Archives to add the assembly date to the letter.
Maybe if it was assembled early (earlier) in 1917, it might be more likely to have shipped with a Commercial Type III Lanyard Loop magazine. ?
Best Regards,
P.S. Here's an Old Post:
Date Of Birth
Other than a few exceptions (noted or used as examples) in the literature,---most likely, the only way to determine the DOB (the assembly date) is to ask COLT. There are many situations where COLT did Not manufacture Pistols in numerical order. The practices and parts that COLT was using at the time the Pistol was assembled, most likely, is the best way to determine how the Pistol looked when shipped.?
Sometimes Pistols (Prewar Model O Match as an example) shipped several times, over several years. And sometimes Pistols sat on shelves for extended periods, or were assembled years after they were numbered.
So, are you going to Letter it? If so, some believe it is important to ask COLT to add the assembly date (DOB) to the Letter.?
P.S. # 2 Here's some examples:
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