Help identifying four different shelving systems (most likely Norwegian)  

Hello addicts!

I cleaned out my grandfathers barn after he passed. I found, among other things, four different shelf systems my grandfather had bought in the 70's or 80's, neatly stacked in the barn.

So far i haven't been able to identify either of them, so I call on you for help. The photos are numbered 1-4 top left for convenience.

The wall hanged desk (4) does not, as far as I figure, belong to the hanging system pictured which is the same wall rails as (3).

Any help would be appreciated.

Thank you
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