Well, it's taken me a day or so....but...5th picture...Magnet (GEC) D2400 if the link works, I think the OP's is a D2400/15 but the pic in the link (D2400) is the nearest I've found yet:
http://www.ebay.co.uk/itm/VINTAGE-19...p2047675.l2557
I'll reveal the Google method in a bit.
Lawrence.