Beeman Double left stamp beeman r1 serial numbers

Trying to figure out how many of these rifles were made with the double left side stamp, I have heard they are extremely rare, and the beeman museum only had 1 or 2 examples of them, my rifle is serial # 903682, all rifles will be 1981 only! please anybody with a double left stamp rifle post your serial #'s to help figure out how many were made initially, thanks!!!!
 
Sorry, probably a dumb question, what does "double left stamp" mean?

Only the very earliest Beeman R1's have the Boswell Bear on the left side and the CA (San Raphael) city stamped on the same left side by the safety button. Later models have the city on the left and the Bear on the right...

85 R1 Left side view .22.JPG
 
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