I wanted to know the version of TYPO3 that is used for an existing website. Looking at the page source, I can see this, suggesting that TYPO3 version 4.7 is in use:  

`<meta name="generator" content="TYPO3 4.7 CMS" />` 

However, the webmaster\* told me that it is in fact TYPO3 version 7.6.
I have no reasons not to trust this person, but my inexperienced self still finds it kind of weird. 

I found some sources suggesting that the version shown in the `<meta>` tag should be the one that is in use. (e.g., see [this](https://www.lexo.ch/blog/2012/04/typo3-remove-the-cms-version-from-the-generator-meta-tag-without-touching-the-original-source/) and [this](http://typo3.3.n7.nabble.com/Removing-the-meta-quot-generator-quot-from-header-td92547.html)) 

**Question: Is it possible that the version of TYPO3 used for a website does not match the version shown on the page source?** 

**Extra notes:** 

* The website was developed around 2011, witch matches the date of release of TYPO3 v 4.7
* The backend seems to match TYPO3 v 4.7 (similar to [this](https://upload.wikimedia.org/wikipedia/commons/b/b9/TYPO3_4.7_Backend.png))
* \*I'm not actually certain this person is the webmaster, but he is at least involved in the hosting
* As an example, here is a site with a TYPO3 4.7 meta tag: <http://asperasoft.com/>

**Update**: As suggested by Mathias Brodala, I logged into the backend, the page title is $siteTitle [TYPO3 4.7.20]. While this is helpful, it does not answer the question.