The Deutsches Technikmuseum Berlin is a museum presenting a large mount of technology history. Quite naturally, they are biased toward presenting a lot of German achievements and this country is known for hosting some of the very best optical engineers and being rightfully proud of brands like Carl Zeiss, Leitz/Leica.
Charlie Sorrel wrote a piece of article for Wired.com, titled “Gallery of Sawn-In-Half Cameras” that I intensely recommend reading.
Now, if seeing them is not enough for you, I suggest that you cut a few of your lenses. The most difficult part is obviously to saw, cut and hack these fragile devices. You need a very powerful and precise saw. I found one at Mainly Metals, a company offering cutting equipment (I no longer can name them “saw”) providing water jet machining.
They cut metal, glass, stone, plastics, wood, with a high-power jet of water filled fine-grain garnet. And, this is environment-friendly!