This is a Parker 51 Aerometric Mk 3 fountain pen which comprises a Black barrel and steel cap. It dates from the 1970's and has a capped length of 13.8cm.There are no barrel imprints and the hooded 14K nib has a generous Medium Oblique tip. The cap has an arrow clip with metal screw and there is an imprint, near to the mouth of the cap, which reads 'Parker. Made in England'.The pen is in very nice condition. The plastic has no cracks, scratches or dings and very minimal surface we...ar. The cap also has no dings or cracks and the nib is lovely.The pen is in working order. It fills easily (unscrew the barrel and depress the pressure bar), holds a good quantity of ink and writes very nicely with the Oblique nib.This is a very good example of a Mk 3 Parker 51 Aerometric fountain pen - nice condition and fully functional. I'm sure that the buyer will be pleased with it but, as always, a full refund will be offered if he/she is not completely satisfied with the purchase.Buyer pays postage and packing. To addresses in the UK the cost is £4.50 (Recorded delivery). To addresses in the USA and Europe it is £9.50 (International Signed For). Buyers from other countries please contact me for prices.Thanks for looking.