There are examples of these in the London Science Museum. I strongly recommend a visit - and not just for those: there's also a (working) full-scale replica of Babbage's difference engine; the entire early history of steam engines (the genuine articles); a duplicating lathe, from the early 19th century; models of the entire history of the (British, at least) tractor; an entire analogue telephone exchange; and way, way, way more. It's a geek's delight. One of my favorite museums ever, but be warned: it took me more than a week's worth of visits to feel like I'd seen it thoroughly.