It’s a Spanish made DUCATi by mototrans. Please se the link http://perso.wanadoo.es/kombo/fotostris.htm
If anybody wanted to buy one ... https://www.madeinitalymotorcycles.com/single-post/2017/09/08/Ducati-250-24-Horas-1970 I think £8K is a bit steep for a 24 Horrors, unless it is really immaculate.