What idiot would abort a world wide Nikonos standard and why?
You might ask these so called "Idiots":
Seacam, Subal, Subtronic, UK-Germany, etc.
By the way you always have the choice between 3 or 5 static pins and bulkheads can be swapped afterwards for a few bucks.
Maybe there is a reason why 5 static pins were often preferred by customers stating things like durability.
Somehow the Ikelite bulkheads look different to the classic Nikonos ones as well. I am not familiar with them. Can I plug a Nikonos TTL Sync cable with 5 lines into it? Well, I have to admit, that's a nice feature.
Seacam:
Nikonos V type plug connection
As standard equipment on our housings, we have been using the conventional Nikonos V type plug for decades. We have made that plug safer by arranging two additional Orings. We also offer the Nikonos V type original socket with two spring-mounted contacts so that you can use Nikon, Ikelite or Sea&Sea flashguns on our housings. We do not only supply adapters, tees and special lengths but also a great variety of plug types.
Julian