FIRST OF ALL, I WANNA THANK YOU FOR YOUR IMMEDIATE ANSWER, BUT STILL I NEED TO ASK, ARE YOU TOTALY CERTAIN FOR THE YEAR OF CONSTRUCTION, SINCE I HAVE INFORMATION ABOUT THAT SERIAL NUMBER THAT BELONGS TO THE YEAR 1947. DON'T GET ME WRONG, I DO NOT DOUBT YOUR CREDIBILITY, BUT AS YOU UNDERSTAND I NEED TO BE 100% SURE. WHATSMORE, I'M GIVING YOU ANOTHER DETAIL. SOMEWHERE IN BETWEEN OR AFTER THE SERIAL NUMBER THERE IS THE LETTER "R".