The Soligor brand sourced lenses from a range of manufacturers, meaning that there are different versions of the 400 f6.3 - confusing or interesting, depending on your point of view. Structurally and optically they are more similar than dissimilar: telescope type long barrel lenses, achromatic objective, tripod mount, hood (not Hxx.. tokina version), doublet/2 element rear group.
Interested enthusiasts on MF lenses have tried to put together a code to id the maker of many of the Soligors. The most common chrome-eared (Soligor made a whole range with the "chrome-eared" design ) Soligor 400/6.3 typically has 9xxxx serials. This has been attributed tro Kino (kiron) but not conclusively, it is clear that there are 9xxxx serial soligors that equate to Kobori made optics eg the 28-200mm f3.5-5.3 see here. This is a tentative synopsis cribbed from relevant threads** (serial numbers beginning.