Yes.
It was the practice for hundreds of years for the reverse and obverse of British Coins to be 180 degrees out.
The practice was gradually phased out during the course of the 19th century.
A British 1786 Threepence, circulated but still in good condition, might fetch anything from £6 to £40 GBP. A reputable coin dealer will be able to give a more accurate valuation. NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A British 1864 Threepence, uncirculated and in absolute mint condition could fetch up to £110 GBP. If it has been circulated but still in good condition, it might fetch anything from £8 to £55 GBP.A reputable coin dealer will be able to give a more accurate valuation.NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A British 1858 Maundy Threepence, uncirculated and in absolute mint condition could fetch up to £40 GBP. If it has been circulated but still in good condition, it might fetch anything to £15 GBP.A reputable coin dealer will be able to give a more accurate valuation.NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A British 1857 Threepence, 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 £10 to £75 GBP. A reputable coin dealer will be able to give a more accurate valuation. NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A British 1877 silver Threepence (QV), uncirculated and in absolute mint condition could fetch up to £80 GBP. If it has been circulated but still in good condition, it might fetch up to £6 to £50 GBP. A reputable coin dealer will be able to give a more accurate valuation. NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A British 1856 silver Threepence (QV), uncirculated and in absolute mint condition could fetch up to £120 GBP. If it has been circulated but still in good condition, it might fetch anything from £10 to £55 GBP. A reputable coin dealer will be able to give a more accurate valuation. NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A British 1873 silver Maundy Threepence (QV), uncirculated and in absolute mint condition could fetch up to £40 GBP. If it has been circulated but still in good condition, it might fetch anything up to £15 GBP. A reputable coin dealer will be able to give a more accurate valuation. NOTE - The reverse of these coins is upside down to the obverse. This is normal.
A general circulation British Threepence was not minted for quite a few years from 1801 to about 1833 inclusive, and only periodically in the years from 1787 to 1800. The Threepence was minted for the use of the British Colonies from 1838 to 1844 before it was reintroduced into the British currency on a regular basis in 1845. You most likely have a Maundy Threepence. The Maundy Threepence would be very similar in appearance to a general circulation Threepence, but would be a little more of a "showy" coin having been minted on polished blanks and specially prepared and polished dies. A British 1826 sterling silver Maundy Threepence (George IV), uncirculated and in absolute mint condition could fetch up to £35 GBP. If it has been circulated but still in good condition, it might fetch anything up to £14 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.
A British 1838 sterling silver Threepence (Victoria), uncirculated and in absolute mint condition could fetch up to £125 GBP. If it has been circulated but still in good condition, it might fetch anything from £10 to £60 GBP. A British 1838 sterling silver Threepence (Victoria)(error = BRITANNIAB), is considered to be extremely rare. 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.
A British 1862 sterling silver Threepence (Victoria), uncirculated and in absolute mint condition could fetch up to £110 GBP. If it has been circulated but still in good condition, it might fetch anything from £5 to £50 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.
A British 1836 sterling silver Threepence (KW IV), 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 £8 to £75 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.
A British 1837 sterling silver Threepence (William IV), 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 £15 to £90 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.