1935 'Prussian Blue' Jubilee UK Stamp

Hello, apologies in advance for my ignorance, but from a little research it seems this stamp is potentially quite collectible, if the accompanying certificate is legitimate and the stamp the correct one. It does appear to match the example in the black and white photo. Thanks in advance for any opinions.


*** Moved by Staff to a more appropriate forum. ***

The Prussian blue IS collectable. Some of the perforations on the stamp - look at the left-hand side - don't quite match those on the photograph, although that could reflect handling of the stamp after the issuing of the certificate. If you were selling, you'd probably be best advised to get a new RPSL or similar certificate.

https://rpsl.limited/

Thanks very much for the quick reply. I certainly see what you mean regarding the left side. I'll look at getting a fresh certificate or at least a professional opinion in hand. I'm fairly close to London, would somewhere like Stanley Gibbons be a good option would you think?

Well, it's the sort of thing Gibbons (which was closely involved in the original discovery) will get out of bed for (they aren't really in the game of selling everything anymore). I can't say whether they'd give you an opinion over the counter, though - maybe give them a ring. And good luck!

A little background on the stamps

https://www.warwickandwarwick.com/l...russian-blue

Gibbons does not issue certificates. Considering your certificate with a black and white photo of the stamp - and I do have doubts for the same reason as GeoffHa - is not worth anything, you, at best, may ask if it would be wise to get a new certificate.

Also, the photograph should be affixed to the certificate and have a dry stamp. This certificate holds no value.

Is this in your possession?

If you do not hold the certificate, be suspicious. The way everything is displayed appears to be intended to hide a complete picture. If the price asked is too good, it is not the Prussian Blue. Also be aware that there is a few thousand quid between a mounted and an unmounted example.

The certificate should state the state of the stamp. The way it is folded, you cannot determine what is said about the state. In fact, you cannot ascertain whether the certificate states it is the genuine Prussian Blue. If anyone is selling it as such, you should ask the question why the picture does not show the full opinion.

So many red flags if this is offered for sale.

The entire thing is fake. The "BPA Cert" number of 15,629 would have been assigned after at least 1984, not 1950. There are many other suspect things but the date is a deal breaker.

Thanks all for your detailed comments. I'll do clearer photos of the certificate and actual stamp etc shortly and address each point above. To be clear, it was just in a large collection that was inherited , not recently bought or for sale, just want to clear up what exactly is here. If it is a facsimile, then no problem at all. Will update fuller photos ASAP

rogdcam - there is plenty to address, but the cert number I irrelevant. There's plenty online dated in the 30 -50,000's throughout the 1960's and 70's. One would assume there is either an indexing system or they were re-sent at som point

I stand corrected.

Maybe the easiest way to ascertain the validity of the certificate is to phone the BPA?

There have been
British Philatelic Association, Ltd., as in the picture posted, and B.P.A. Expertising Limited as posted by rogdcam.
The numbering appears not to have continued.