What metal is under the white gold in 20s/30s watches?

Submitted by alwayscode390 on December 2, 2023 - 10:12pm

When looking at engraved 20s/30s watches, I've noticed when the gold is rubbed through or chipped, the metal looks more white than expected.  Almost like some type of plastic in appearance.


Does anyone know what metal was used under the gold?