The B-52 was designed a few years after WWII and entered service shortly after the Korean War. The father of one of my college roomates was a B-52 pilot in Vietnam, and it looks like these planes will still be in service after I've reached military retirement age.

I figure I can also bring up the M1911 pistol. Adopted in 1911, continued as the primary sidearm until 1985, and I heard customized versions are still in use by some units authorized non-standard arms.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.