Top, right to left:
Hussar of Serbsky (Serbian) Hussar Regiment (source: Colonel Yuryev’s register)
NCO of Serbsky (Serbian) Hussar Regiment (source: Colonel Yuryev’s register)
Hussar of Gruzinsky (Georgian) Hussar Regiment (source: an estimate of a contract compiled in Königsberg)

Bottom, right to left:
Hussar of Vengersky (Hungarian) Hussar Regiment (source: Colonel Yuryev’s register)
Hussar of Vengersky (Hungarian) Hussar Regiment (source: a contract signed at the town of Bromberg, Poland)
Hussar of Moldavsky (Moldavian) Hussar Regiment (source: Colonel Yuryev’s register)