Promo, your rifle was likely assembled at Springfield in the early interwar era. The barrel is a WWII replacement of Springfield manufacture. Your stock is off a Rock Island production rifle made in 1909. It should be a one recoil lug stock but has likely been upgraded to two lugs, correct? "DAL" was a late WWI/Early interwar period Springfield inspector. His initials were likely applied at the time of refurbishment at Springfield Arsenal when the second stock lug would have been installed following WWI. There may also be two 'Circle/P' proof marks on the wrist too, not just one.

Of course, if your gun has only one stock lug, then I could well be mistaken. Just a good educated guess...
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