I really like toned coins. When I saw this toned beauty in the CoinArchives database, it was first choice for this page about British crowns and half crowns of 1831 to 1837.
The coin in our picture comes from Heritage Auctions. It is in Proof-64 condition, as established by the Numismatic Guarantee Company (NGC). The coin is exceptionally choice, with deep mirrors, portrait and shield both frosted and a few scattered ticks in the metal on obverse. The reverse is sensational in both quality and color. The coin is toned in vivid shades of amber-gold and bluish green iridescence. Wow. With such credentials, this coin sold well above catalog value at $3500 in a 2014 auction. 'Normal' coins usually sell below catalog value, as outlined below.
HALF CROWN (dated 1831 to 1837): 30 mm diameter
CROWN (dated 1831 only): 38 mm diameter
HALF CROWN dated 1831 (all are proof)
fully uncirculated: $3000
HALF CROWN dated 1834
worn: $30 US dollars approximate catalog value
average circulated: $100
well preserved: $300
fully uncirculated: $800
HALF CROWN dated 1835 to 1837
worn: $50 US dollars approximate catalog value
average circulated: $180
well preserved: $800
fully uncirculated: $1600
CROWN dated 1831 (all are proof)
fully uncirculated: $25000
If you have a nice-looking example of one of these coins, take it to a knowledgeable collector or professional coin dealer for an in-person appraisal. Values can vary widely based on condition, eye appeal, and minor variations in the pattern and inscriptions.
As always, CoinQuest is indebted to gracious institutions that release copyright to us, sharing the joys of coin collecting with as many as are interested. Thanks in this case goes to Heritage Auctions. What a beautiful coin!