One of the old school
Definition 1 of 1
Pro Tip 1/3Tradition Emphasis
This expression highlights adherence to long-established practices rather than modern methods. 
Despite modern technology, Mr. Johnson, one of the old school, prefers a typewriter.
Pro Tip 2/3Not Old-Fashioned
'One of the old school' implies respect for traditions, not being out-of-date or unfashionable. 
As one of the old school, she values classical music while enjoying current genres.
Pro Tip 3/3Cultural Reference
The phrase may imply specific traditional values or behaviors characteristic of an older generation in a given culture. 
Coming from one of the old school, he always dresses formally for dinner.