Vintage Johnson Matthey 100 oz .999 Silver Poured Bar Low Serial 000340 ERROR

Available for sale is a Vintage Johnson Matthey 100 oz .999 Silver Poured Bar. What sets this bar apart is the neat low serial of 000340 as well as the placement, since the bar had a natural indented pour on the bottom left the serial needed to be placed on the top right. Could perhaps be unique? Instead of buying a regular 100oz bar it would be nice to add one that is over 40 years old to your collection, just looks far more awesome than a modern boring 100oz bar. Please have a look at the photos as this is the exact bar you are receiving.