THE PARKER JOTTER IS THE MOST POPULAR BALLPOINT PEN .IT IS VERY REASONABLE IN PRICE, AND A VERY DURABLE PEN WITH A VERY GOOD REFILL , AVAILABLE ALL OVER.THE HARDEST COLOR TO FIND IS THE MANARIN YELLOW 1 , AND ALSO THE CLEAR  DEMONSTRATOR .PARKER NOW ONLY MAKES THESE AVAILABLE IN THE USA IN 4 COLORS .  BUT THEY AVALIABLE 1N ABOUT 25 COLORS IN OUR EBAY STORE ..ALL PARKER JOTTERS REGARDLESS WHEN THEY WERE MADE , WILL TAKE A PARKER BALLPOINT REFILL MADE NOW, AND ALSO THE NEW GWLL REFILL