PRIMROSE ELECTRONICS 187

Hi all,
Some time ago came into my hands a few channels an old table radio brand PRIMROSE ELECTRONICS. I have not found any information on the net about them: No photos or diagrams, or anything! 
The modules are at the top labeled "187" and at the bottom "Primrose". Nothing more.
Apparently, this is a 70's broadcast mixer. Has stereo line input with input transformers (Sowter surely), and mic input, also with transformer. Three-band EQ.
Anyone know anything about these channels? Someone knows some English old technician who can talk about these modules?
I would appreciate any type of information.
Thank you!

P. D. The translation is from Google... :-\ Sorry

I have not found any information on the net about them: No photos or diagrams, or anything!

Click to expand...

Have you searched this forum? There have been previous posts with quite a bit of info.

If, in this forum there are only pictures of my channels, set by a Spanish user. Do not know anything about them ...