Os Giken Gearset . Help!

[gdzlar1]

Hey guys purchased an os giken gearbox without transfer case, brought it from a guy by the name of Phil rido from Brisbane, how would I know if it's got a os giken gearset like it was advertised, it has a 5 speed gearset in there, which has never been used, how can I tell from the exterior of the gearbox that it has it or do I need it inspected? It still has the fresh aqua colour oil fresh, any help is required and appreciated thank you guys

[J'z-R33]

The Counter Shaft will have the OS logo on it. Open to inspect.

I would highly recommend Taking the box to a gearbox or competent workshop to inspect/service it, before installing it.