Featured Anything interesting or of value here?

Found these in a box passed down to me. I know some of the coins are interesting.

 

It is all interesting.
You already know about the Dutch coins, including the gold rider.
I'll tag @daveydempsey for the others.

The hallmark in the last photo is the Dutch oak leaf mark for .583 or .585 gold, depending on the period. There are three oak leaf marks for three different periods, they have minute differences. I'll see if I can tweak the photo to see which one it is.
Which item goes with the mark?

 

It is the oak leaf for 1853-1905, which was to be expected, but I'd rather be sure.
That means .583 gold fineness, which is a smidgen under 14k. Here in the Netherlands it is still considered 14k.

 

Thanks for your helpful response! It goes with that snake brooch.

 

I was hoping it did, I love that brooch and it is nice to know it is Dutch. It is actually a knotted rope, called an Algerian knot.
Algerian knots became popular after Napoleon's campaign in North Africa.

The pin is likely to be silver, a combination they did a lot, for strength.

 

Upper left coin (if real) 10 Gilders - almost 2 tenths (.02) of .900 fine gold. Realistically around $400.

 

Forgot to add, there would have been gold tassels on the ends, where you see the loops.

 

Since most of it is already IDed (and enough to make a joolie drool), the single cuff links look like rolled gold or gold-filled and the screwback earrings are 1950s Moonglow plastic. They aren't high value, but I love the stuff. The button/pin with flowers has gloxinias on it. No idea of the name in Dutch, but I'd bet it's close to the same. They were a very popular flower in 1880s/1890s.

BTW -what does the BACK look like?

 

Im loving that snake brooch !

 

Cuff button, probably meant for a lady. Gold-filled.

 

Veeery close: gloxinia.
Both English and Dutch use the Latin name, probably because it isn't native to Europe, so there is no long tradition.

 

They were a hot decorating item along with Saintpaulias, aka african violets. The latter didn't like full sun at all, making them good house plants. My grandmother loved them.