When I first began my interest in JOFA helmets, my goal was to own an actual JOFA 366; just like my favorite player, Teemu Selanne. It took a long time, and a lot of effort, to finally get my hands on one of these! Shown is actually my second 366, the first one I found did not have a front bumper, which was quite a bummer (but gave me a chance to create a great template for creating super accurate modified helmets!).
Here are some pictures of the JOFA Visir-ett packaging; which includes a vague diagram on how to properly install the half shield. It comes with four wide head screws; two 9mm and two 7mm. Also, it includes two black rubber washers; which with a little thinking (no thanks to the diagram), I realized were to fill the sunken holes, where the original screws went. This apparently makes sure that there is no gap between the shield and the helmet, resisting the chance of cracking due to over tightening.
When I got this helmet, a few parts were missing; one being the chin strap. But since I have acquired quite a collection, and have helmet parts, including a bunch of removed straps from modified helmets, laying around; I trimmed and melted the edges of a new JOFA strap, and used my finest JOFA snaps to complete. Notice that some snaps have little slits on the side of the dome, which you can see if you look very closely above. I'm not sure why some are like this, but they are more difficult to come across.
Finally pairing the JOFA 366 with an actual JOFA half shield really gave me a kick; this is by far my favorite helmet. I remember, as a kid, seeing this helmet, and thinking "that's the coolest helmet I've ever seen". This is still true, I don't know of any other helmet that has such a beautiful, simple, yet complex, design.