Hi Peter --
The database I use has 548 Charles I crowns and half crowns from 1625, but I cannot find with the amazing, pronounce C R initials as your coin.
I will be happy to look further, but I need the detailed inscriptions (or at least partial inscriptions) from your coin, and I cannot read them from your pictures. Your pictures remain small and I can't enlarge them on my computer.
Please type out your best guess of the individual inscriptions.
Here's the issue. There are 1000s of half crowns of Charles I in the auction database I use to estimate approximate value. They all have honi soit etc. Many have CR and horseback king. I can't look through 1000s of pictures. I need inscriptions to separate out candidate coins.
Your pictures are small. I cannot read them accurately.
What are the two inscriptions above the CR? Are they XIII??? OVT:GIAS??? Is there ES or something between the CR??? Is there a date???
With that kind of info I can narrow the search to a few hundred coins. Once I find a match or two, the auction prices realized gives approximate value.
Ah. That did the trick, Peter.
As you say, it turns out it is a half crown weight, not an actual half crown. It carries the weight of a silver half crown.
Of the millions of coins in the CoinArchivesPro database, only one -- just one -- matches your piece. The one that match is from an old auction. The 3-weight set pictured below sold for $173 US dollars back in 2005. Yep, dollars were worth more back then. I'd wager your piece has risen in value to the $200 to $250 range, but that is just a guess.
Here is the auction description from Spink. The description is for the three weights shown.
Spink > Auction 5033 Auction date: 1 December 2005
Lot number: 817
Price realized: 100 GBP (Approx. 173 USD / 148 EUR / 229 CHF)
Halfcrown coin weights (3), James I, weight for gold Halfcrown, crowned bust to right, I.R. .M.BRIT below, rev. crown, II.SIX D. below (Withers 854), very fine; Charles I, weight for silver Halfcrown, king on horseback to left holding sword, rev. crown over .CR. over XXX (Withers 1042), poor but clear; Charles I, weight for silver Halfcrown, armoured figure on horseback to left brandishing sword, Garter around with HONI SOIT QVI MAL Y PENSE, rev. large C*R* with WITH OVT GRAYN ES above and 2s * 6d below (Withers 1070), good very fine (3)
Estimate £ 100-150