How Rare Are The Poured Johnson Matthey 1/2 Kilo Silver Bars

Just found that APMEX has one 500g JM old poured bar in stock with 100% markup:

http://www.apmex.com/Product/72921/..._Poured.aspx

I have worked for a big and well known company the likes of Colonial Acres. And I can tell you, in the so many years I've been buying and selling bullion for that company, this is the ONLY one I've ever seen. The moment I saw it, I was like "Wow!" It was a very old lady who sold it to our company, maybe 70-80 yrs old. She claims that the bar came from her father. She mentioned that she had about 7 or 9 more of the same bar, and that she will bring them in again (but she never did). Anyway, I've always wondered how rare this "500 grams" Johnson and Matthey silver bar is. All I know is I've only seen one ever in the so many years I've been buying and selling the stuff. Based on the serial #, there is at least 10,000 made; but how many are really still around? It would be safe to assume many have been either melted, or perhaps, kept safe in bullion vaults, just based on the lack of any type of information about them and how rarely they show up. Also, I seldom see a certificate on silver bars, except on the more modern ones made by new refiners; this one has one, BUT the lady said she might have mixed the certificate with another because she provided us with the wrong one as you can see in the picture (the bar has "7" as the last no. while the cert has "3"). Anyway, I hope this helps everyone interested in knowing how rare the 500 gram JM silver bars are even if I was not really able to provide a figure. I hope that someone can tell me how much they are worth? I'm not interested in selling, just interested in knowing. Advanced thanks.

@SWRBXX: As I've just mentioned, the serial no. on the bar and the assay are not the same. How I wish that old lady provided me the correct one. There are columns at the back of the certificate, with date, description, and etc as the titles, but nothing was written on it. No date, no bank. Thanks for giving me an idea on the value.

Hi all - I am new the forum and new to collecting bars/rounds. Those are some nice bars in this thread for sure. I really enjoy the reading and the pictures that you folks shared. Hope one day to add one of those 500g JM bar to my collection. Thanks for sharing.

NVU