It is always interesting to see how a photographic genre persists over time. I recently had the opportunity to see how one genre - ‘The important overseas visitor tours a factory’ remained constant over about 85 years. The first photograph shows a Western man in business suit being shown around a railway factory in China. It was one of a group of images found in an old suitcase in a junk shop. Papers in the collection identify the man as British and the date late 1920s – early 30s. When I sold the collection the helpful and knowledgeable Chinese buyer identified the factory as the Tangshan Railway Vehicle Company. And there on their website I found a modern day equivalent – a group of Western visitors being given a guided tour of the modern factory. Interesting to play spot the difference. In 1920 they brought in a local studio photographer to the factory and the images were presented on his embossed mounts. For the modern photograph someone probably just used their mobile phone.