Hi there, I have a Mont Bland pen that I no longer use but cannot identify it to find out if it is worth selling - can anyone help with a model number based on the images? Many thanks for any advice you can offer.IMG_0472.JPGIMG_0473.JPGIMG_0474.JPGIMG_0475.JPGIMG_0472.JPGIMG_0473.JPGIMG_0474.JPGIMG_0475.JPG