Strelets Soviet WW2 Winter Partisans .. and that strange figure in my set?

Over the festive and New Year break I had the opportunity (like many of us) to do some "hobby sorting" which included some 20mm figure plastic figure basing (see below, some lovely 1/72 scale WWII Strelets Soviet WWII Partisans in "Winter Dress"):  

They are an unusual but lovely set and so full of character (see below, the rugged partisan leader who accepts no excuses): 

Rugged and determined, armed with a SMG and ready to meat out retribution to the invaders (see below, you have got to like those boots): 

The agricultural worker turned partisan, perhaps not a great shot with the rifle but he will be persistent  (see below, gotta love those ear flaps): 

Then this mystery figure, at first I am thinking this is really the partisan's great, grandfather riding one last time against the fascist hoards in defense of the motherland, after all he does look Russian, of a Cossack style of sorts but definitely the wrong century! (see below, what is going on? It turns out this is a Strelets "Easter Egg" or "Cuckoo in the nest"): 

The answer comes from the ever useful Plastic Soldier Review Page: 

http://www.plasticsoldierreview.com/ShowFeature.aspx?id=15