Identifying help

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Hello

This is my first post on this board, so hello to everybody.

I bought some speakers at boot sale (3EUR) in hope to get my hands on full range drivers to try. In the enclosures it reads "National panasonic speaker system" Model RE-7670.
6 Watt, 16 Ohm.

And in the drivers it says 16 cm P.D Speaker EAS-16P91SA.

Do anybody know these drivers? Are these worth anything to try in some diy project? Any enclosure recommendations? or should these be used in open baffel.

See picture.

Thanks in advance.