1973

Philadelphia struck 64,964,000 Kennedy halves in 1973, the lowest Philadelphia mintage of the decade and a sharp step down from the 153 million pressed in 1972. The drop reflects declining commercial demand for the denomination, which by the early 1970s had already begun the long slide toward becoming a primarily collector and mint-set issue rather than a circulating workhorse. Composition is the standard cupronickel clad introduced in 1971: 75% copper, 25% nickel in the outer layers bonded to a pure copper core, weight 11.34 g, diameter 30.6 mm, reeded edge. No P mintmark appears, since Philadelphia did not add its letter to halves until 1980. Roberts's GR initials sit at the neck truncation, Gasparro's FG initials to the right of the eagle's tail feathers.

For an issue with a relatively modest mintage by Kennedy standards, the 1973 is still common in any circulated grade and easily available in lower Mint State from broken mint sets. Strike characteristics follow the cupronickel pattern set in 1971 and 1972, with central hair weakness above Kennedy's ear and softness on the eagle's breast feathers the recurring problems. Bag marks concentrate on the cheek and jawline. The 1973 carries no major catalogued die variety, so the authentication question collapses to confirming a no-mintmark coin of the right weight and composition; counterfeiting risk is negligible at this date. PCGS, the Professional Coin Grading Service, and NGC, Numismatic Guaranty Company, populations thin meaningfully at MS66 and become condition-rare at MS67, despite the unremarkable mintage. Original-roll coins offer the best raw source for a clean gem.

The 1973 functions as a routine common date in the series, worth face-plus in lower grades and worth certification only above MS66 where the spread between common and condition-rare opens up. The reduced mintage relative to neighbors gives it a thin specialist following, but no Key Date or Semi-Key status: the 1970-D still owns the structural scarcity slot of the cupronickel-era circulation Kennedy. For the broader story of the design transition to copper-nickel clad and the series' production arc, see the Kennedy Half Dollar series history.