Video comparison between a 1957 Martin D28 and a 2020 Collings D2HT.
Both currently available at Austin Guitar House.
MARTIN D28
https://austinguitarhouse.com/1957-martin-d28-vintage/
COLLINGS D2HT
https://austinguitarhouse.com/collings-d2h-t-rw-b-s-trad-spec/