A quick search of Ebay for anything related to sniper rifles—telescopic sights, mounts, manuals, cases, etc.—illustrates the collecting "frenzy" for sniper rifles, both old and new.
Weaver telescopic sights used on the World War II-era Model 1903A4 Sniper Rifles sell for $900 to $1,500 dollars, only most of those offered for sale are fakes or are misrepresented commercial sights. The "chat rooms" are full of misinformation because there is very little reference material available.
Collecting the American Sniper Rifle, 1900 to 1945 provides accurate information that will allow the collector to determine whether or not a particular rifle or telescopic part—or other accessory—is correct.
The book provides a detailed description of...
the sniper rifle with all parts and markings that make it uniquely a U.S. military sniper rifle.
the telescopic sight with all parts and markings that make it uniquely a U.S. military sniper scope.
the bases and mounts with all parts and markings that make them part of the U.S. military sniper scope assembly.
The books also contains a history of the development of each particular sniper rifle and telescopic sight. Its mounting on the rifle and sighting in are described in detail. A history of the development of the rifle leading to its use as a sniper rifle is included in an appendix, as are descriptions of British and Canadian sniper rifles that used American-produced telescopic sights.
This book covers the sniper variations of the Model 1903 Springfield:
U.S. Model 1903 .30 Caliber Rifle with the Warner & Swasey Telescopic Sight
U.S. Model 1903 .30 Caliber Rifle with the Winchester A5 or Lyman 5A
Telescopic Sight:
Model 1903A1 (Sniper) U.S.M.C. Rifle with the 7.8x Unertl Telescopic Sight
Model 1903A4 .30 Caliber (Snipers) Rifle with the Weaver M73B1 Telescopic Sight.