old-timer

[ ohld-tahy-mer ]

/ ˈoʊldˈtaɪ mər /

a person whose residence, membership, or experience began long ago and has been continuing for a considerable length of time; veteran.

an old person.

an old-fashioned person or thing.

Origin of old-timer

First recorded in 1855–60; old-time + -er¹

He noticed an “old-timer” in a red USMC baseball cap sitting nearby with a few other Marine Vietnam veterans.

Home on the Fourth of July: Two Marines, Two Purple Hearts |John Kael Weston |July 4, 2013 |DAILY BEAST
If and when CRE becomes resistant to this old-timer, the cupboard is truly bare.

Why I’m Not Worried About Dying From a Superbug, and You Shouldn’t Be, Either |Kent Sepkowitz |March 8, 2013 |DAILY BEAST
A veteran would have recognized him as an old-timer and probable officer, and heeded, automatically.

Mercenary |Dallas McCord Reynolds
“You sure know how to shoot a surprise into a fellow, old-timer,” he drawled.

Shoe-Bar Stratton |Joseph Bushnell Ames

I watched one old-timer in the ranks as he lifted the tin cup to his lips and took the initial gulp.

"And they thought we wouldn't fight" |Floyd Gibbons
The sergeant, an old-timer, replied, "The dance starts right now."

500 of the Best Cockney War Stories |Various
The old-timer had been very serious in laying down the law that no man must travel alone in the Klondike after fifty below.

Lost Face |Jack London

old-timer

a person who has been in a certain place, occupation, etc, for a long time

US an old man