I think its post war rubbish you find alot of this sort of thing on Ebay from sellers in Poland and Baltic states
As you noted "strange" to say the least- Numbers that really mean nothing other than to enhance the legality of the item etc - A post 45 fantasy.
"He who hesitates is lost - is not only lost but miles from the next exit"
I'm a little disappointed ... but I keep it anyway she is very beautiful and not young...
it is a nice item.