1956-only Hawk family launch on the South Bend 289 V8 — the 1956-only four-trim Hawk launch (Flight Hawk / Power Hawk / Golden Hawk / Silver Hawk) on the President-chassis 289 V8, the 1956-only South Bend plant code, and the 1956-only Hawk-family body-code prefix on the cowl tag.

1957-onward Hawk carryover — the 1957-only Golden Hawk 289 supercharged fitment carry, the 1957-onward South Bend plant code continuity, and the 1957-only Hawk-family cowl-tag body-code prefix.

1958-onward Hawk Packard-Windsor engine retirement — the 1958-only Hawk 289 South Bend V8 carry after the Packard 352 retirement, the 1958-onward South Bend plant code continuity.

1959-onward Hawk Silver Hawk carryover — the 1959-only Hawk trim consolidation, the 1959-onward South Bend plant code continuity, and the 1959-only Hawk-family cowl-tag body-code prefix.

1960-onward Hawk Silver Hawk carryover — the 1960-only Hawk 289 South Bend V8 carry, the 1960-onward South Bend plant code continuity.

1961-onward Hawk Lark-chassis compact transition — the 1961-only Hawk 289 South Bend V8 carry on the Lark compact chassis transition year, the 1961-onward South Bend plant code continuity.

1962-only Gran Turismo Hawk launch — the 1962-only Gran Turismo Hawk trim package on the Hawk body, the 1962-only South Bend final-assembly plant code, and the 1962-only Gran Turismo Hawk cowl-tag body-code prefix distinct from the 1962-onward Avanti body-code prefix.

1963-only Hawk-GT 289 — the 1963-only Hawk-GT 289 chassis authentication, the 1963-only Hawk-GT cowl-tag body-code prefix distinct from the 1963 Avanti R1 body-code prefix (the off-by-one-platform decode error), and the 1963-only South Bend final-assembly plant code (the December 1963 South Bend plant closure year).

1964-only Super Hawk with the R2 289 + Paxton SN-60 supercharger on the Hawk body — the 1964-only Super Hawk bracket casting distinct from the 1963 Avanti R2 bracket, the 1964-only Super Hawk oiling-circuit routing distinct from the 1963 Avanti R2 routing, and the 1964-onward Hamilton Ontario final-assembly plant code (post-December-1963 South Bend closure).

1965-onward Hamilton Ontario Hawk carryover — the 1965-only Hawk 289 Hamilton-built V8 carry, the 1965-onward Hamilton Ontario final-assembly plant code, and the 1965-only Hawk-family cowl-tag body-code prefix on the Hamilton body code.

1966-only Hawk terminal year — the 1966-only Hawk 289 Hamilton-built V8 carry on the final model year, the 1966-onward Hamilton Ontario final-assembly plant code continuity, and the 1966-only Hawk-family cowl-tag body-code prefix.

Terminal year of the Hawk family on the Studebaker 289 V8.