Seasider

https://www.silverstacking.co.uk/product-page/39mm-coin-capsule-holder-direct-fit-intaglio-mint-2oz-rimmed-capsule-x-5

The name Gold & Silver Bureau rang a bell, and with a negative connotation. A quick Google search turned up:
https://www.mirror.co.uk/opinion/money-opinion/p-s-investigates/a-right-coinman-533667 from August 2002.
I can remember seeing John Coppin's adverts in Exchange and Mart way back in the 1960s, and at that time assumed he was a straight dealer. It seems that some time later, he got greedy or desperate, possibly both. 
He expanded and set up at least one high profile business, Gold & Silver Bureau being one of them, employing a large staff of telesales people. His businesses failed and defaulted more than once, owing customers large amounts of money. G&SB was based in Ilford, Essex. Coppin lived in Chigwell, Essex.
When he and his companies finally left the scene, a number of his previous employees set up similar but smaller businesses, in and around the Essex area. I seem to remember some of them using prestigious sounding London postal addresses.
Although we have dealt with at least one of these some years ago, none of them appeared to have had much numismatic knowledge or interest, their main skills appeared to be in salemanship. None of them ever impressed me as having great integrity.
I can't give any meaningful opinion on their certificate.

https://www.the-saleroom.com/en-gb/auction-catalogues/cheffinsfineart/catalogue-id-srche10195/lot-73da0c50-1c87-4acd-8e1b-ab84011859c1
This lot comes with a Certificate of Origin from something called the Gold & Silver Bureau.  Would that be the sort of thing NGC would accept?  It dates to 1997 so after the Spink auction.

1873

If you are near Hatton Garden pop into HGM - I think they have a machine which will test whether the coin is 22 ct.

It's going to take him more than 6 hours to get home afterwards.

It's going to take him more than 6 hours to get home afterwards.

It's going to take him more than 6 hours to get home afterwards.

It's going to take him more than 6 hours to get home afterwards.

@Alun is making just his "BOXES" alone becoming a collectible - that artwork is SUPERB!

Atkinsons have an 1852 Shield for about the same price - judging by the picture it may not be as good as this one.  Presumably they'd bargain a bit?

1837 half crown of William IV.  I really like this design, probably my favourite and I'd love to have a better example.  1837 is the rarest date though 🙂
 

Scroll down the page and they have a free Queens Beasts Dragon - online only.😀

One of my favourite coins (that I don't own) is the 1804 5 shilling Bank of England token.  It has a legend on one side saying Five Shillings  :  Dollar.  Picture borrowed from Chards.
 

One of my favourite coins (that I don't own) is the 1804 5 shilling Bank of England token.  It has a legend on one side saying Five Shillings  :  Dollar.  Picture borrowed from Chards.
 

One of my favourite coins (that I don't own) is the 1804 5 shilling Bank of England token.  It has a legend on one side saying Five Shillings  :  Dollar.  Picture borrowed from Chards.
 

One of my favourite coins (that I don't own) is the 1804 5 shilling Bank of England token.  It has a legend on one side saying Five Shillings  :  Dollar.  Picture borrowed from Chards.
 

What a classy looking "coin" - (I guess it has a legal value);  although Britannia has certainly improved her looks recently - she looks a bit worn out here which I can only put down to the French who were up to their usual tricks at the time.

One of my favourite coins (that I don't own) is the 1804 5 shilling Bank of England token.  It has a legend on one side saying Five Shillings  :  Dollar.  Picture borrowed from Chards.
 

One of my favourite coins (that I don't own) is the 1804 5 shilling Bank of England token.  It has a legend on one side saying Five Shillings  :  Dollar.  Picture borrowed from Chards.
 

They also have a bullion 2019 quarter ounce Britannia for £269.
https://harringtonandbyrne.co.uk/2019-united-kingdom-quarter-ounce-gold-uncirculated-britannia-coin.html

You just don't want to admit it came in a Westminster box.

You just don't want to admit it came in a Westminster box.

You would think they could run to a box and a capsule.  Does the coin come out of the flip?  If so what is to stop someone separating it from the certificate?  I have a coin from Australia which is sealed in the flip and the certificate has a warning that it is invalidated if the seal is tampered with.  The Royal Mint is obviously more trusting.

1927 Wreath Crown (proof)
 


1927 Sixpence (proof)