[mix4fix]

8 inch driver
6 mounting holes
"52463" under the cone
solid silver magnet
written "8 ohm" on the magnet

Any ideas?

PS: they are for sale.

[FullRangeMan]

8 inch driver
6 mounting holes
"52463" under the cone
solid silver magnet
written "8 ohm" on the magnet

Any ideas?

PS: they are for sale.

What do you mean say by solid silver magnet?

[mix4fix]

What do you mean say by solid silver magnet?

It's a smaller, solid piece of silver metal as the magnet. Has indentation on the "top", but otherwise a solid piece. It's does not look like a "normal" magnet on most any driver. It is smooth and has curved edges.

Vifa?

[FullRangeMan]

Yes magnets are all a solid piece, its Alnico or Ferrite?

[S Clark]

Yes magnets are all a solid piece,

Not all are solid.  Many better made drivers have a vented magnet. 

[mix4fix]

Not all are solid.  Many better made drivers have a vented magnet. 

That's what I call a "normal" magnet on a driver. There is no vent hole on these.

These drivers are probably Vifa, or Peerless.

[JCarney]

Take a pic already and post it. Why the guessing game?

JCarney

[FullRangeMan]

This magnet are Ferrite, probably Barium alloy.

[mix4fix]

[FullRangeMan]

These photos are not the same driver than the previous post.
These photos show a woofer, it goes down to 29Hz, 8 ohms,
the Fs number was erased.
This magnet not visible, it is fully encapsulated by a steel cup.

[S Clark]

With no manufacturers code, I'd say you're not likely to I.D. them. 
They are probably Chinese, since most are.   Where did they come from? 
BTW, that 29 Hz probably is the FS. 

[FullRangeMan]

The basket is the same used by Common Sense drivers that were made in China.