Hexagonal Bolts - What age is this item? (Pics added..)

I bought a pair of candelabra. The bolts used to assemble them are confusing:

There are square bolts at the bottom plate and in the middle that connects the rest of the candelabra together: there's a slightly 'tilted' liberally made hex bolt.

Did they use hex bolts in the late 1800s?

Or did I just go through enormous efforts and money to buy a reproduction / post 1910 (non-victorian at all) pair of candelabra?

 

Photos?

 

Pictures:

 

Those are lovely.
Can't answer your question about the bolts, although the last washer on the right is drilled off center, indication to me that it was not a manufactured washer.

Can you give us a better picture of the mark

 

It's the same one in both pictures, just different sides of it. As I said, it's "crooked".

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I see an M and K in the box.
I think Austrian. Will see what I can find.

 

I see no problem with hex nuts.

 

Anyone one have a Rontgen's, mine's at the store. Not going again until Monday.

 

are the crystals (small round ones) flat on one side or both sides have points

 

Most of them are pointy on both sides. A couple of crystals have been replaced.

 

that's a good sign that they are real crystal