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Gothic Florin

Queen Anne 1708 Shilling

Commonwealth 1653 Shilling

Underrated date in higher grades, had a devil of a time finally getting this one....

Lima and Vigo captured silver.

An Oxford 1643 halfcrown, Morrieson dies K-28. The large central plume on the reverse is only seen on coins struck late in 1643 and early 1644 at Oxford, and presumably was concurrent with Charles' Parliament from January through to April.

And another struck soon after the New Year. This being Morrieson dies C-4

Recently graded. Only cameo at NGC.

Not too shabby for George V - the only known specimen proof 1920 Halfcrown:

@Clio said:

If you don't mind me asking. How do you come into rarities like this? Is this something that was at auction once upon a time or required some further connections to get?

You do your homework and sit back. Sometimes it takes a while - I've been waiting nearly 20 years for one coin to resurface and another I can't find reference to for the past 112 years. What goes around, comes around, but there are quite a few rarities that only come to market once every generation - hence the need for patience. A few acquisitions from the past decade such as:-
A Civil War halfcrown with the Boar's Head mark on the reverse. 2 known with this one off the market from 1979 to 2019, and the other untraceable since 1952

Or this groat from the same series which is the only unimpaired example available to collectors as far as I can establish which needed a near 10 year wait

Or this Oxford groat which was off the market from 1979 to 2011. I can find another, but it's in the BM

Also, some things find their way to you if you have already shown willing to buy similar items and aren't put off by a large price tag.

If you are in for the long haul, build a database of the rarities and establish what the best pieces are. Don't just rely on TPG population reports because there are too many inaccuracies in the labelling. Get catalogues and do a lot of reading because Illustrated catalogues go back well over 100 years.

I couldn't agree with RobP more, as it has taken many years in the traditional way (or something close to it) to manage these coins and one gets to know one's sources.

Meanwhile, here is a more ordinary 1842 half crown which in my estimation shows what not a lot of money can get you; it is not top graded nor is it a major rarity:

Crown

Crown

A selection of British coins of various eras

Early Saxon gold thrymsa, Crondall phase

Early Saxon silver sceatta, series W

Saxon Northumbrian styca of Aethelred II

Middle Saxon penny of Ceolwulf I of Mercia

Anglo-Viking penny of York

Late Saxon penny of Edward the Confessor

Norman penny of William the Conqueror

Plantagenet penny of King John

House of Lancaster groat of Henry VI

House of York groat of Edward IV

Tudor testoon (shilling) of Henry VIII

Stuart groat of Charles I

Hanoverian shilling of George II

OK, I love my Vickies, here is another for you. Perhaps you'll not find another - do you recognise this specific coin?