There were two versions of Springfield sniper rifle.One was the Marine version.It used an 8X ,long tube scope in target mounts.I'm not an authority,but I believe some were Unertl,and some were Lyman.
The Army used a2 1/2 X Weaver 3/4 in tube scope.I believe it was a model 330 with a military designation of M-73.
Later in the war,the Lyman Alaskan was looked at by the Army,accepted and adopted as the new scope for the 1903A4 Springfield,and over 3000 of them were ordered.
However....the war was ending.The order was canceled.
So,I'm not sure any actual 1903A4 rifles were assembled with Alaskans,but,on paper,the Alaskan was a1903A4 scope.
I learned of this when building my clone of a 1903A4 .
I am not an expert or authority,but I believe a few Alaskans were mounted on M1 Garands.Then,that basic scope was redesigned with hinged turret covers,a small sunshade,etc.I think another company,not Lyman,got the contract to produce them.Seems like "Ford" was in the name.
I also believe,later on,maybe 70's? Either Redfield,Denver or Leupold made a limited replica run of the Alaskan.
Mine works very well for me.