This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
PendulumRejilla. Pndulo de rejilla Gridiron pendulum temperature compensated pendulum invented by British clockmaker John Harrison around This is demonstration model mounted on stand Own Tamorlan Gridiron pendulums Files by User Tamorlan
Page 2023 Free-images.com. All images are Public Domain