Oh shit, this is my kinda thread. Well, time to flex my armor knowledge.
>>4166802 This armor is being worn by Dr. Tobias Capwell who is the curator of Arms and Armor at the Wallace Collection in London. I believe he jousts in this armor. I don't know the exact reference for this harness but it's probably based off an English funeral effigy from the middle of the 15th century.
>>4166805This here is a fantastic reproduction of an Italian export harness. That being a northern Italian harness made for the German market. Notice the file work on the plackarts and more fluting that is uncommon on a standard Milanese harness. The reproduction is made by Jeff Wasson.
>>4166807I'm thinking this helmet is more than likely from the negroli/missaglia workshop in northern Italy. That is all embossing and hammerwork and probably dates mid to late 16th century.
And the harness that is in pic related is a German tournament harness for foot combat. Tail end of the 15th century.