No, they are not rare. British Coins were minted that way for hundreds of years. The process is called "Coin Rotation" or "Die Axis". British coins were minted with a 180 degree rotation, so that reverse is 180 degrees out of alignment with the obverse.
The practice was gradually discontinued during the course of the 19th century. By 1887, all coins were minted without "coin rotation".
Many other countries used "coin rotation" on their coins and not always at 180 degees.
A British 1883 sterling silver Shilling (Victoria), uncirculated and in absolute mint condition could fetch up to £200 GBP. If it has been circulated but still in good condition, it might fetch anything from £10 to £90 GBP. A British 1883 sterling silver Shilling (Victoria)(Proof FDC - plain edge), uncirculated and in absolute mint condition could fetch up to £3,750 GBP. NOTE - The reverse of these coins is upside down to the obverse. This is normal. The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
The 1883 Half-Sovereign has a crowned shield on the reverse. The mintmark, if one exists, will be below the shield. Royal Mint London - no mintmark Melbourne Mint - "M" below the shield Sydney Mint - "S" below the shield
On the reverse above the D in Dollar.
Henry Gale - British Army officer - was born in 1883.
A British 1883 Halfpenny, uncirculated and in absolute mint condition could fetch up to £175 GBP. If it has been circulated but still in good condition, it might fetch anything from £1 to £55 GBP. A British 1883 Halfpenny (rose for broach on obverse) is considered extremely rare. A reputable coin dealer will be able to give a more accurate valuation.
There does not seem to be very many British Halfpennies that rate a "rare", and most of them are variations or errors. British general circulation Halfpennies that have been designated as rare include - 1722 - copper - inverted "A" instead of "V" 1860 - copper - date on front 1862 - bronze - die letter to the left of the lighthouse 1883 - bronze - Victoria has a brooch or a rose at her neckline.
All British Pennies from 1883 to 1911 inclusive have no mintmark. They were all minted at the Royal Mint London.
The mint mark on any Morgan dollar is on the reverse above the letters DO in dollar.
See the related questions below.
Look at the back of the coin for the word "CENTS" under the wreath. 1883 was the first year of issue for this coin and the early coins did not have cents on the reverse, they added it later. It makes a big difference in value. Post new question.
Look at the back of the coin for the word "CENTS" under the wreath. 1883 was the first year of issue for this coin and the early coins did not have cents on the reverse, they added it later. It makes a big difference in value. Post new question.
The British Ten Pence coin was not issued until 1968.