The “best” Hi-Standard Model HD Military serial numbers are early, low-numbered examples with a “U.S.” property mark (typically serials below ~10,000 for the first contract), or original, unmodified HD Military pistols with serial numbers that fall within the known WWII contract ranges (roughly 8,000 to 150,000, depending on the specific variant). Avoid mismatched, scrubbed, or post-war commercial serials if you’re after collector-grade authenticity.
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The most valuable HD Military pistols will have "U.S. PROPERTY" stamped on the left side of the frame, above the trigger guard. If it doesn’t have this, it is a commercial model or a post-war export return. The best examples have crisp, deep stamps that weren't buffed off during a arsenal refinish. histandard model hd military serial numbers best