Please help identify speaker units


I am currently asked to sell some HiFi equipment for an acquaintance. Amongst others a DIY speaker in a concrete cabinet blush

I would like to know what the speaker units are, but as they cannot be disassembled I would need your help to identify one of the units. I have attached to pictures, one of the units seen from the front and a drawing with some dimensions of the units.

The units seem to have a metal membrane covered with a very thin mesh as I hope you can see on one picture. The dimensions are in millimeter.

Can someone please help identify the speaker units?

Thank you.

 

hififuchs

As it seems, I cannot add pictures to posts. - I will do my best to describe the units:

Face plate dimension: 78x68 mm - Face Plate is black with 4 holes (one in each corner)

The speaker cone are 50mm in diameter and looks like made of titan or other metal. The cone is covered with a very thin mesh (something like a thin women’s nylon stocking). With age the glue used on the speaker cones has turned yellowish and can be seen in the middle of the cone and around the edge to fix the mesh. 

There is 9 of them in each speaker - I suppose they are meant to be midrange units.

I would be very happy if someone can make sense of my explanation and help identify them. I am happy to send the pics via PN if anyone has an idea to identify the units.

 

Post removed 

@ theaudiopath wrote: Look like early Jordans from the UK - and he is absolutely right.

Thank you for your great help.