The 2nd contract Model 1917 Army Brazilian run was in 1946 of about 11,800, most using surplus WW I produced frames in the 166,000 – 175,150 range with many exceptions as usual that have serial #s far out of this range, most with older pre 1926/1927 style round top strap and small U notch rear sight. This is why most 1946 Brazilians do not have post war sliding bar safeties and likely not side plate safeties, but may have cyl hold open detents. Use caution if you remove the yoke.
Some were the newer flat top frames generally in the 207,196 – 209,878 range, with a few round tops also reported in that range. These '46 contract guns had WW I surplus 1917 smooth grips. These guns are also stamped "MADE IN U.S.A.". However, the butt serial #s read with barrel to the left like all post war hand ejectors, and is the easiest way to know which contract the gun was built for.