Old-school (adjective)

1. Relating to or characteristic of a traditional or longstanding way of doing things.
2. Adhering to or favoring traditional methods, values, or style.
3. Belonging to or originating from an earlier time.

Origin:

From the combination of old + school, with school referring to a system of teaching and learning.

Examples:

1. The old-school coach believed in discipline and hard work.
2. The company's management preferred an old-school approach to marketing.
3. The old-school method of teaching required students to memorize large amounts of information.
4. He had an old-school attitude towards manners and etiquette.
5. The restaurant served an old-school breakfast with pancakes, eggs, and bacon.