Great Dane

The suspensions on those medals look very British.

Romanian Order of the Star.

There's a OBE in there too. Interesting that he had all the mentioned orders 'represented' on his breast bar, as I assume he was Grand Cross in all of them.

I would like to have a look, but that is a very tiny photo...

I think we have them all identified... Interesting to see is that he got the Grand Cross of the Order of Dannebrog with diamonds (on the Dannebrog breast star).

Just checked the Danish Court- and State Calendar. Dardel is listed as a recipient of the Pro Dania medal (the calendar normally doesn't list additional decorations to foreigners unless the decorations are Danish).

You are of course right... it does have a crown suspension... Shooting from the hip here, but could it be the Danish Pro Dania medal? The position on the bar would be correct and it was often seen with Danish Red Cross medal. I'm sure there are many other possibilities... Photo from medal-medaille.com:

Could it be the Swedish Silver Wedding Medal 1906 or is that too old? (photo from Liverpool Medals)

Could it be the Saxe-Ernestine House Order? (I assume you - by 'this' - are referring to the decoration half hidden behind the sword handle)

Interesting... if you play around in Photoshop with the black & white converter (Photoshop has separate sliders for R, G, B, C, M, Y and K), you can try to recreate how old cameras 'saw' colors back then. Most modern B & W converters just average the R, G and B values. Here is the result with less G, C, and M and more B compared to the photo from back then

You may be right... at least there was one for sale on ebay described as "Lotta Svärd WW II Ski and Walking Badge 2nd Class"... Bear in mind, though, that that is not necessarily a correct description... just what the seller thinks it is... https://www.ebay.com/itm/Finland-Finnish-Lotta-Svard-WW-II-Ski-and-Walking-Badge-2nd-Class-Silver/114098519487

The one with the blue enamel is a Lotta Svärd badge. https://en.wikipedia.org/wiki/Lotta_Svärd

Probably M and K and something like a 'shield', because M and K are very elaborately formed, whereas that one is not. Unfortunately , an M an a K is way too generic to google, so hopefully someone in here recognizes it...

The pentagonal ribbon and the crest look Danish, but I need a higher resolution scan of the crest to be sure. I have never seen this one before. Is the suspension made of the letters M K and O (maybe D)?

I don't know that particular badge, but you can try to Google "Skyddskåren".