Hi GreyC,
Thanks for such a quick response; Info is rather sketchy but in 1928 he was in the 9th but he might have been, later, an officer perhaps as mother definitely remembers him on 'the large black horse'! Maybe as he was a career soldier he was promoted later but i think the family was quite well off from his roots. Just rumours/supposition but they were about a fairly good career.
I think he was mostly known as Hermann Jordan (from Bernberg)
Thanks for your help and interest
D