Wood's been a popular tonearm material since... well... always.
Grado and Pickering, e.g., among many others, made consumer hifi arms starting (at least) in the early 1960s.
Flip-through every page of this 1962 Allied Radio Catalog containing vintage radios, phonographs, amplifiers, amateur / short wave radios, knight kits & electronic parts.
www.alliedcatalogs.com
The ever-popular
Microtrak 303 arms for broadcast use were wood(en).
I actually had a couple of these (dump finds) for a while -- not that I can find a photo of 'em.
In the massmarket "record player" business -- Garrard was a big fan of wood as an antiresonance element, as seen in the LAB-80 and LAB-95 record players' arms.
(random internet image of a LAB-80)
Had one of each of
those, too -- come to think of it. Long gone, though. Garrard usually put about four times as many parts in their automatic record players than prudence would have dictated.
This thing has an ebony "armwand", too. Still have this one -- boxed up.