Cast iron calling cards. These old access covers from the streets of Glasgow all feature the name of the plumbing company which installed them. While no longer common, you can find similar ones advertising different plumbing and building companies throughout the city. Most of the businesses no longer exist, but the one in the bottom left, John Richmond and Co Ltd, is still trading today, some 135 years after it was established in 1885.

Old branded access cover in the Govanhill area of Glasgow. A cursory search hasn't located R Morton and Son, but I presume they were plumbers. A deeper dive into the records should confirm this, but the site of their premises at 277 Ballater Street is now occupied by the Gorbals Leisure Centre.