Diana 350 Magnum year Identification

I'm Trying to find out what year this rifle is. I put on Layaway at at local pawn shop , and I have the serial # .
It is a RWS as embossed on the brown plastic woodgrain stock which also has 350 Magnum there. I did as much research as I could , and I believe it is a FERUERKRAFT model as it has no raised cheek. I can't find a pic of this on the web. The serial # is
250013906547. If anyone can help me learn about it I would appreciate it
Thanks OldVet.
 
to my knowledge they all came with wood stocks and if it is what you say they were made for one year only
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to my knowledge they all came with wood stocks and if it is what you say they were made for one year only
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Maybe I Made a mistake. The stock had the circle RWS insignia , and 350 Magnum in the stock. The wood grain patterns were very nice. I read where others had mistaken the deep reddish brown finish with a heavy lacquer finish for plastic. I only had in my hands for a few minutes. It passed my check list. #1 Could I cock it yes very easy , and easier than my .177 Air Tac.
#2 Great lock up no wobble very tight
#3 perfect crown yes. #4 nice rifling in barrel. I jumped down the layaway rabbit hole . I had no pellets , so I dry fired it once. Very powerful report..
I'll have it in October if all goes well. OV