The Beacon clock tower at Customhouse Quay in Greenock is a fabulous example of this. Designed by local marine artist William Clark (1803-1883) and erected in 1868, it is wonderful to look at and also contains features essential to its position on a busy quay. I'm only going to describe some of them and leave the others for another day. Let's start at the top -
This picture shows the Beacon as it was in 1878.
(The photograph comes from the book "Greenock From Old Photographs" (ISBN 950068713)by Matt Anderson and Joy Monteith, published in 1980 by Inverclyde District Libraries.)