Speaker ID and Advice

[Subways81]

Hi Audiophiles

I have been given 4 identical bookshelf speakers with the idea of replacing my Sony AV speakers.

The speakers have no branding or info on the speaker housing nor the speakers themselves. Hopefully somebody here can help me get an idea of what speakers they are.

Also, my Sony amp and speakers are rated at 6 ohms, if these speakers are 8 ohms will it damage my amp?

Here's a few pics of one of the speakers

 

[ponder]

Check for markings on the drivers & tweeters. Looks cheap and nasty from here but you never know...