So I now have various different values:
Primary=1784, secondary=o/c (
https://www.vintage-radio.net/forum/...d.php?t=151444)
Primary=360, secondary=1.87K (
https://www.vintage-radio.net/forum/...ad.php?t=67429)
Primary=1900, secondary=6000 (ebay)
Seems one may have been wound with a much thicker wire gauge?
The windings are well and truly stuck together as you can see in the picture so I am still having trouble getting a few metres off to measure the reistance. Current guess is there maybe 16,000 turns!