Mr T

I only had a brief look but in my notes I had obverses 4 and 5 with the rotated D in F:D: and obverse 6 having the straight D in F:D: (from Dracott's articles I think). I didn't look too closely at which obverse it actually was but the D looks a bit rotated to the right.

It is a shame, though how long has it been since the last new bun penny variety was discovered - a couple of years? I think it was the different alignment of obverse 2 or something like that. I'm not sure when the last discovery before that was. There are probably more discoveries to be made but there can't be that many more to be made.

No worries - I suspect this is quite a recent development (like maybe the last week or two) - I think I saw it on Twitter (which is down right now so I can't check). Previously all I'd been able to find online was https://discovery.nationalarchives.gov.uk/browse/r/h/C11038 which I think would require payment.

For those who haven't seen, the Royal Mint Museum has digitised some of the older annual reports: https://library.royalmintmuseum.org.uk/archive/royal-mint-annual-reports

Oh I see - I remember the unlisted coins in your auction @Nick - I didn't realise the different dates corresponded to different reverse dies too.

No worries. I think a few years ago now eBay started enforcing that all Gothic crowns needed to be sold in slabs (maybe only eBay USA).

Looking back at this, it definitely looks like a new obverse - the bottom bar on the E in DEI is definitely different. What is the difference with the thumb and St Andrew's cross? I can't quite make it out, but it looks like the fingers are diagonal to the trident in one and perpendicular in the other. Is this meant to be all 1911 are type 1 and all 1912H are type 2? Looking at a few pictures on the PCGS website all the coins I looked at (1911, 1912 and 1912H) all seemed to have the normal E (not the long bottom bar).

What is it about the ribbon that seems different? I can see the different distance between the rim and design and the different alignment of the digits.

Is the die crack through the R on the one in the slab? I can't quite make it out.

http://www.predecimal.com/forum/topic/2853-unlisted-12d/ is the the thread (it was hard to find with search).

Late to the party but I use Google Sheets which I periodically export as a .csv and store on my phone for offline access/as a backup.

Nice find - noted.

Looking on a bigger screen the plait looks quite flat but the rest of the coin isn't overly worn - do you have a bigger picture of the obverse?

I think from the small numbers I've looked at only the halfpenny variety is hard to find.

First I've seen of something like that - I too thought they came in little draw string bags. How many came in each bag anyway? I've never been able to figure out the monarch's age relating to the number of coins because sets of four are a thing but unequal numbers have been made in some years.

Weight seems okay and from my phone at least nothing is jumping out as suspicious, but there are a lot of good fakes. Maybe do a search on the forums for previous discussions of fakes and see if there is anything to look out for.

Decimals are clearly coming into their own!

Good point - has there ever been a true explanation of die numbers on the silver coins, or is all we have speculation?

Not too bad - was that the one whose entire mintage was shipped to Australia?

Interesting - I've never heard it called die chatter before - must be the mint's internal terminology. I would have just called it double-struck.

Yes you're right - there are fainter lower windows. Maybe I meant there are no upper windows when I wrote that - I don't have a reverse I in hand but it doesn't look like there aren't upper windows.

In the notes I've left myself I have reverse G has lighthouse with two windows and one rock between lighthouse and shield, reverse I has lighthouse with no windows and two rocks between lighthouse and shield.

I agree - I think the design isn't too bad all things considered but it does have a cartoony look to it.

What is plate 432? Is it a Canadian provincial coin?

Has anyone got their hands on a copy yet? I'm tempted to get one from https://spinkbooks.com/products/english-silver-coinage-since-1649-7th-edition-maurice-bull?variant=40339604963522 but is there much new in the 1816-1970 section? I don't expect so as Bull doesn't go as in-depth as Davies but the 1837 mule sixpence slipped under my radar in the 6th edition.