This is one of the wonderful National Security Fountain pens made in the 30's and 40's in the UK. They are a top quality pen, made from good plastics with solid trim. This one dates from around 1935 and is finished in the attractive Brown Marble which has retained much of its original lustre. The pen is in overall very good condition with minor wear marks. The pen is fitted with a lovely Medium Italic 14ct gold nib. The pen is designated the "Double Tank" It is a bulb filler accessed by unscrewing the blind cap.