Legit place to download an older version of Google Chrome (2016)

I'm aware of similar topics on the network, but the solutions are now obsolete. I want to install Chrome 51 for Windows (current stable version is 52). As unbelievable as it sounds, this is a really tough cookie. I was able to find only a single website which offers the Chrome 51 standalone installer for download. The website - slimjet - doesn't seem trustable though.

How can I install Chrome 51?

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